Agscience fair
If six plants solf for prices of $4.10
$4.32, $5.52, $7.18, $7.92 and $9.58, what is the mode of these prices? ,
Find the median of the following amounts: $4.10
$4.32, $5.52, $7.18, $7.92 and $9.58. , 6.35
Find the average of the following amounts: $4.10
$4.32, $5.52, $7.18, $7.92 and $9.58. , 6.44
11
10, 13, 11, 12, 16, 14" , 12
24
15, 18, 20, 18, 22, 24, 26, 18, 26, 24
"
Guess
Which of the following is an ethical practice when working with animal subjects?
None of the answers are correct
Entrepreneurship
a student owned business that serves as an SAE
Opening/closing ceremony
a traditional contest designed to emphasize the purpose of meetings and duties of officers
Single inclined plane
a type of bevel with one edge used on wood chisels and plane ions
The ecologist used a laser rangefinder and a piece of equipment called a clinometer to find the heights of the trees. Later
she found that her equipment was calibrated incorrectly and indicated that all trees were .5 m taller than they really were. What typre of error occured? , Inaccurate measurement
Romex
sheath cable containing individually insulted electrical wires
A scientist testing the affects of a chemical on apple yield sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall
the number of apples harvested from each forest is counted. The orchard sprayed with the chemical yeilds an average of 60 apples per tree, the other orchard yields an average of 40 apples per tree. Based on the data, the scientist would: , Determine that the chemical increases apple yield
Anneal
to cool steel slowly so as to make it soft and malleable
Rip
to cut along the grain of wood
High speed drill
twist drill made tempered especially to drill holes in steel
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What is Allen's hypothesis? , If the chemical activity of the metallic wrapper is increased, then less rusting will occur.
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What is the control in this experiment? , Iron nail
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What is the independant variable? , Type of metallic wrapping strip
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What was the dependant variable? , Amount of rust, color of water
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. Which of the following is not a constant in this experiment? , Type of metallic wrapping strip
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. Which of the following would be the most appropriate title for the experiment? , The Effectiveness of Various Metals on Preventing the Rusting of Iron
Which of the following sets of key terms would be used to locate relevant articles for a student doing research on protein synthesis?
Amino acids, transcription, mRNA
Which of the following is NOT a curdling agent used to make cheese?
Amylase
What is the best source of information used in scientific research?
An article published in a peer-reviewed science journal.
An example of an applied science is
Animal science
Researchers who conduct ___________ seek to resolve a specific questions with the results being used immediately to identify solutions.
Applied Research
The horizontal or vertical line found at the bottom and a left side of a graph.
Axis
Which of the following should not be included in the conclusion of a scientific paper?
Background on the topic
A pictorial display of a set of data using bars to indicate the value.
Bar graph
Researchers who conduct ________ attempt to answer scientific questions without having an immediate use for the answer.
Basic Research
A statistical error that occurs when samples are drawn so that all members of the population do not have an equal chance of being included
Bias
Where should someone dispose of contaminated plastic ware?
Biohazard bag
A biology class wanted to develop a research project to predict the effects of a new highway on wildflower species found in the Piedmont region of Virginia. The class could best conduct such a study by sampling flowers found in the highway construction area —
Both before and after construction is completed
An example of a basic science is
Chemistry
Which step of the scientific method includes observing what takes place and recording what you measure or observe?
Collect the Data
Any factor that is not allowed to change.
Constant
A group or sample that is used as a standard for comparison.
Control
The part of an experiment that serves as a standard of comparison.
Control
The best term to describe the group in an experiment that is normal or unaffected by the researcher is...
Control group
Which sentence best states the importance of using control groups?
Control groups allow for comparison between subjects receiving a treatment and subjects receiving no treatment
Which of the following sets of key terms would be used to locate relevant articles for a student doing research on DNA replication?
DNA polymerase, deoxyribonucleotides, ligase
In 1869
DNA was discovered within the nuclei of cells. By the 1940s, scientists knew that chromosomes were made of both DNA and protein but did not know which was the genetic material of cells. In the 1950s, scientists demonstrated that DNA is the material responsible for heredity. In 1953, using information collected by other scientists, an American biologist and an English physicist built a three-dimensional model of DNA. These discoveries best illustrate the importance of — , Collaborative efforts among scientists
The bits of information gathered in an experiment.
Data
Which section of the scientific report contains tables and graphs?
Data
The factor in an experiment that responds to the purposefully changed factor.
Dependant variable
The term best used to describe the variable that changes as a result of the experiment is...
Dependant variable
Which step of the scientific method includes developing a plan for carrying out the project?
Design the experiment
Which of the following would be considered basic research?
Determining the structure of an atom
Which of these words would you NOT associate with the scientific method?
Disorganized
Alice needed to design a science project. She decided that she wanted to focus her project on how an earthworm's behavior helps it survive. Alice wrote down four ideas about earthworm behavior that she wanted to test. Which idea can be tested experimentally?
Earthworms will move away from direct light sources.
Which of the following is NOT an aspect of setting up a legal scientific lab book?
Editing using white out
The term to best describe the group changed by the researcher is...
Experimental Group
An independent variable is a factor that changes because of procedures conducted on the dependent variable.
FALSE
Which step in the scientific method includes developing a statement to be proven or disproven?
Form a hypothesis
Which of the following should be worn when working with chemicals?
Gloves
Which piece of Equipment should be put on without contaminating the outer surface?
Gloves
A pictorial display of a set of data .
Graph
The person providing the foundation for scientific study of heredity was _________.
Gregor Johann Mendel
A student wanted to look at plant growth in five different soil samples. He planted the same type of seeds in identical containers and left them together in full sunlight. He gave each plant the same amount of water and charted the growth of each plant stem. What is the dependant variable in this experiment?
Growth
Which question cannot be answered scientifically because the quantity cannot actually be measured?
How happy is a chimp when it finds it's favorite food?
A statement of possible relationship between the independent and dependent variables.
Hypothesis
The best term to describe a proposal intended to explain certain facts or observations is..
Hypothesis
What is a statement that proposes a cause-and-effect relationship between two variables?
Hypothesis
Which step of the scientific method encompasses deciding specifically what is it you wish to find out?
Identify the Problem
Which hypothesis is most correct?
If the amount of fertilizer is increased, then the plants will grow faster as measured by plant height.
Evaluate the following hypothesis: If hand sanitizer is effective then it will inhibit bacterial growth.
Incorrect: Missing how the results will be measured.
The factor in an experiment that is changed on purpose.
Independent variable
The term best used to describe the variable changed by the researcher is
Independent variable
Which domain of biotechnology does fermented foods and beverages fall under?
Industrial and Environmental Biotechnology
A paragraph at the beginning of a report that states the reason why the experiment was done.
Introduction
The idea behind a(an) _____________ is to see what happen if...
Investigation
Which of the following is most useful for protecting a student's skin from harm during an experiment?
Latex gloves
Which biosafety level characterizes most high school laboratories?
Level 1
Which biosafety level would be used to characterize a facility that contains the small pox virus?
Level 4
Which section of the scientific report contains a list of supplies needed?
Materials and Methods
Data collected using a measurement instrument and a standard scale.
Measurements
This is the middle point of a set of numbers going from the least to the greatest.
Median
Which domain of biotechnology does the production of insulin fall under?
Medical/Pharmaceutical Biotechnology
The device that produces magnified images of structures that is too small to see with the unaided eye.
Microscope
The number that occurs the most in a set of numbers is called ___.
Mode
"Given below are the daily high temperatures for one winter week in Albany
New York. What is the mode of these temperatures?
Which of the following best explains why a student researching genetics should use the most recent textbooks available?
New discoveries frequently add to older knowledge in genetics
Which of the following is a safe practice when working with electricity?
None of the answers are correct
Which of the following is a safe practice when working with molds or microorganisms?
None of the answers are correct
Which of these would be called results?
Number of fruit flies
"
Observation
For what to the initials PPE stand?
Personal Protective Wear
Which of these is not a step of the scientific method?
Plagiary
Which of the following is the correct distinction between pluripotent and totipotent cells?
Pluripotent give rise to many but not all cell types and totipotent give rise to all.
What is the correct order of the components of a lab report?
Problem/question, hypothesis, material, procedures, data/observations, analysis, conclusion
A professor of molecular biology has completed an experiment on mutations. The results indicate that the current understanding of how mutations occur is incomplete. Which is the most appropriate way to share the results of this experiment?
Publish the results in a scientific journal
"
Qualitatitive
$7.50
$9.25, $8.75, $9.50, $7.25, $8.50" , 2.25
Which of the following is a qualitative variable?
Quality
Which of the following is not a quantitative variable?
Quality
The difference between the minimum and the maximum observation in the data is called the....
Range
Which of the following should not be included in the results section of a scientific paper.
Reason for conducting the experiment
Two plant species found in a dry region of the western United States exhibit vastly different abilities to survive. Species A has very slow stem growth and few leaves but is very abundant. Species B has rapid stem growth and many leaves but is very rare. Which hypothesis is most likely supported by this information?
Reduced stem growth may give species A an advantage over species B
The number of times that a level of the independent variable is tested in an experiment.
Repeated trials
Used to reduce the possibility of chance errors.
Repeated trials
Which step of the scientific method encompasses reading up on and becoming informed about the topic?
Review of literature
A series of equal intervals and values placed on each axis of a graph.
Scale
Why is it important to report an experiment's procedures and results accurately?
So others can repeat the experiment to reduce the chance of bias
A student wanted to look at plant growth in five different soil samples. He planted the same type of seeds in identical containers and left them together in full sunlight. He gave each plant the same amount of water and charted the growth of each plant stem. What is the independent variable in this experiment?
Soil
Which of the following should be worn when working with chemicals?
Splash proof goggles
A number used to describe or analyze a set of data.
Statistic
A control group is used as a comparison to the group where things (variables) are changing.
TRUE
The scientific method was developed to help scientists organize the process of solving problems.
TRUE
Which of the following methods would provide the most accurate information for students collecting data about local attitudes concerning the use of alternative fuels for automobiles?
Take an opinion poll of drivers
___________ is defined as the application of science to solve a problem.
Technology
A hypothesis must be:
Testable
What is the controversy surrounding the using of human stem cells?
That using embryonic stem cells is potentially destroying a life.
Larry believes that mice exposed to microwaves will become extra strong . He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found 5 out of the 10 microwaved mice were able to push the block away. 8 out of the 10 non-microwaved mice were able to do the same. Identify the dependant variable.
The ability to move the wood block
A biology class of 24 students decides to measure the height of each student and then calculate the average height for the class. Which of these is a possible source of error in this activity?
The accuracy of making and recording measurements
Fred notices that his shower is covered in a strange green slime. His friend Joe tells him that coconut juice will get rid of the green slime. Fred decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. Identify the dependant variable.
The amount of green slime
Professional scientific journals would be most likely to reject an article for publication in which of the following situations?
The article lacks information about the methods used in the study.
Which of the following examples would NOT be criteria for an article being reliable?
The author by an intelligent individual.
Richard was observing black swallowtail butterflies in the field. Which one of these is an observation he made about a black swallowtail butterfly?
The black swallowtail laid its eggs on a prasley plant.
Fred notices that his shower is covered in a strange green slime. His friend Joe tells him that coconut juice will get rid of the green slime. Fred decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. What should Fred's conclusion be?
The coconut juice did not get rid of the green slime.
In which of the following situations is researcher bias most likely to be a factor that could compromise the validity of a scientific investigation?
The funds for the research come from sources that have a vested interest in the outcome of the research.
Larry believes that mice exposed to microwaves will become extra strong . He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found 5 out of the 10 microwaved mice were able to push the block away. 8 out of the 10 non-microwaved mice were able to do the same. Identify the experimental group.
The microwaved mice
Larry believes that mice exposed to microwaves will become extra strong . He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found 5 out of the 10 microwaved mice were able to push the block away. 8 out of the 10 non-microwaved mice were able to do the same. Identify the control group.
The non-microwaved mice
Larry believes that mice exposed to microwaves will become extra strong . He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found 5 out of the 10 microwaved mice were able to push the block away. 8 out of the 10 non-microwaved mice were able to do the same. What should Larry's conclusion be.
The non-microwaved mice were stronger
Which factor is NOT a criteria to be examined when determining if a resource is relevant?
The number of authors involved in formulating the information.
Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?
The percentage of humidity
Which of the following is most important when judging the quality of a scientific theory?
The quality and reliability of data that supports the theory
Fred notices that his shower is covered in a strange green slime. His friend Joe tells him that coconut juice will get rid of the green slime. Fred decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. Identify the control group.
The side of the shower sprayed with water
Fred notices that his shower is covered in a strange green slime. His friend Joe tells him that coconut juice will get rid of the green slime. Fred decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. Identify the independant variable.
The solution sprayed on the shower
A toy manufacturer is investigationg why its new toy trucks are breaking down much more quickly than its older toy trucks. What would be the most useful information for the toy company to aquire?
The strength of the materials used in the new toy trucks
Which of the following statements about scientific theories is not correct?
Theories are incomplete, temporary ideas.
Things or factors that can be assigned to take on different values in an experiment.
Variables
"Customers are a nursery are willing to pay the following prices listed below for a 5 gallon shrub. What is the range of these prices?
...
"Find the mode of the following numbers.
...
"Find the range of these distances of tagged bears from the site of their original capture:
...
"Find the range of these maze times given in seconds:
...
"Find the range of these trial scores:
...
"Fish hatcheries are an enclosed environment used to farm a large number of fish. A fish biologist wondered if fish raised in hatcheries would be able to survive in a wild environment. The
...
"Joe tested the effects of fertilizer on plant growth. What is the mean height (cm)for the 6 control plants listed below?
...
"José traveled for 2 hours at a rate of 70 kilometers per hour and for 5 hours at a rate of 60 kilometers per hour. What was his average speed for the 7-hour period?
...
"Observations that describe something using words is called ____________ observations.
...
"Roads are slippery when there is snow on the roads. This is an example of
...
"Ten earthquakes were measured using the Richter scale and their magnitudes are listed below. Which of the following statements is true?
...
"The average annual wind speed for the 5 windiest cities in the U.S. is given below in miles per hour. What is the mean of these annual wind speeds?
...
"The following is the number of number of inches of rain on 10 different days. What is the mode?
...
"The manager of a nursery recorded the number of orange trees sold per day in 2 weeks (below). Which of the following statements is true?
...
"The number of tornadoes that have occurred in the U.S. in the last 8 years is listed below. Find the median.
...
"The speeds of 12 turtles are recorded below (in cm per minute). Find the mode.
...
"The test scores of 9 study participants are listed below. Find the mode.
...
"What do you do to test a hypothesis?
...
"What is the median age of the 7 children whose ages are listed below?
...
-21
0, +2, -15, 0, +5, -18, +7, 0, -32, +21" , The mode is 0.
What is the scientific notation for the following number: 1
000,000,000 , 1.0 x 109
The mean of a set of numbers is 108. The sum of the numbers is 2
052. How many numbers are in the set? , 19
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. What is the dependant variable in this experiment? , Kind and number of fossils
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. What is the independant variable in this experiment? , Depth of sample from suface
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. What type of data was Susan collecting? , Qualitative and Quantitative
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. Which of the following is a constant in this experiment? , Amount of soil
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. Which of the following is the control in this experiment? , There is no control in this experiment?
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. Which of the following would be the most appropriate title for Susan's experiment? , The Effect of Bank Position on Fossils
Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered if changes in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5
10 ,15, 20, 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample. Which of the following would not be an appropriate hypothesis for this experiment? , Fossil's found in Susan's yard are from prehistoric times.
"In a crash test
11 cars were tested to determine what impact speed was required to obtain minimal bumper damage. Find the mode of the speeds given in miles per hour below.
8
11, 9, 14, 9, 15, 18, 6, 9, 10 " , 9
What is the range of this set? 10
12, 14, 16 , 6
132
121, 119, 116, 130, 121, 131, 117, 119, 135, 121, 129, 119, 134 " , The modes are 119 and 121.
18
13, 0, 16, 3, 15, 0, 11, 14, 0, 12" , 0
15.4
14.0, 13.5, 13.1, 12.9" , 13.78
13.2
14.5, 12.9, 13.9, 15.6, 14.1, 12.3
10 km
15 km, 12 km, 14 km, 8 km, 16 km" , 8 km
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. How could this experiment be improved? , All answers are correct
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. What is a constant in this experiment? , Amount of baking soda
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. What is the control? , The glass with pure vinegar
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. What is the dependent variable? , Time to finish reacting
Larry believes that mice exposed to microwaves will become extra strong . He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found 5 out of the 10 microwaved mice were able to push the block away. 8 out of the 10 non-microwaved mice were able to do the same. Identify the independant variable.
Whether or not the mice were microwaved
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. What is the independent variable? , Concentration of vinegar
Bobbie wanted to find out if diluting vinegar would change the speed at which it would react with Grey's Baking Soda. She used identical glasses. Into each of 3 glasses she put 2 g of baking soda and 25 mL pure vinegar; in each of 3 more glasses she put 2 g of baking soda
15 mL vinegar and 10 mL water; into each of 3 more glasses she put 2 g of baking soda, 10 mL vinegar, and 15 mL water. In each case she measured the time it took the vinegar and the baking soda to finish reacting or to stop producing carbon dioxide gas bubbles. Which of the following could be a hypothesis for this experiment? , All answers are correct
"
18 and 24
Find the mode for the values: 15
18, 18, 23, 37, 29, 32, 32, 33, 37, 37, 54 , 37
What is the mode of this set? 6
2, 4, 5, 7, 3, 8, 2, 9 , 2
"
3.3
What is the range of this set? 2
4, 6 , 4
What is the median of this set? 2
4,6 , 4
39
42, 34, 37, 39, 44, 41" , 39
35
43, 39, 46, 43, 47, 38, 51, 43, 38, 40, 45" , 43
The horizontal line found at the bottom on a graph.
X Axis
Where should the independent variable be on the graph?
X axis
The vertical line found at the left side of a graph.
Y Axis
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. What is the dependant variable? , Regeneration of parts
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. What is the independant variable? , Concentration of Aloe vera
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. What type of data was Jackie collecting? , Qualitative
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. Which of the following is a constant in this experiment? , Amount of solution
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. Which of the following is the most appropriate title for Jackie's experiment? , The Effects of Various Concentrations of Aloe Vera on the Regeneration of Flatworms
Jackie read that Aloe vera promoted healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe vera on the regeneration of flatworms. She bisected the flatworms to obtain 10 parts (5 heads
5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe vera to the groups. Fifteen mL of Aloe vera solutions were applied. All flatworms were maintained in a growth chamber with identical food, temperature, and humidity. On day 15, Jackie observed the regeneration of the flatworm parts and categorized development as full, partial, or none. Which was the control for this experiment? , 0% Aloe vera
What is the mode in this set? 3
5, 4, 2, 5, 3, 5, 2, 5 , 5
Find the range of the values: 2
5, 6, 6, 8, 10, 12, 17 , 15
Calculate the mean for the values: 2
5, 6, 6, 8, 10, 12, 17 , 8.25
7.0
6.2, 7.7, 8.0, 6.4, 7.2, 5.4, 6.6, 7.5, 5.9 " , There is no mode.
"
62 6/7
684
764, 1133, 656, 702, 1303, 856, 1132" , 810
Find the mode for the values: 68
77, 79, 84, 85, 84, 90, 91, 93, 100 , 84
93
79, 83, 89, 90, 71, 85" , 22
7.3 s
8.4 s, 8.0 s, 7.5 s, 9.4 s, 8.7 s, 9.1 s" , 2.1
"
9
10
9, 12, 11, 8, 15, 9, 7, 8, 6, 12, 10
82
92, 75 , 91, 92, 89, 95, 100, 86" , 92
89
93, 87, 86, 85, 94" , 89
What should be added to a microbial plate prior to disposal?
95% ethanol
Which of the following would be considered a good resource for a literature review?
A textbook
Which of the following would be considered applied research?
Affect of feed additives on livestock growth
Which domain of biotechnology does transgenic plants and animals fall under?
Agricultural Biotechnology
The best term to descrie the application of scientific principles and new technologies to agriculture is...
Agriscience
One relationship of agriscience with many other sciences is that
Agriscience is the application of many other sciences
"Eleven daily temperatures for Juneau
Alaska are listed below, in degrees Fahrenheit. Which of the following statements is true?
Alice needed to design a science project. She decided that she wanted to focus her project on how an earthworm's behavior helps it survive. Alice conducted a controlled experiment and tested a single variable. She used one earthworm for her experiment and conducted the experiment once. She typed her conclusion and glued it to her science project poster. The next day
Alice was surprised to find out that she received a low grade on her conclusion. What could Alice do differently to increase her grade on her conclusion? , collect more data by repeating the experiment or using more worms
Alice needed to design a science project. She decided that she wanted to focus her project on how an earthworm's behavior helps it survive. Before designing her experiment
Alice went to the library to learn more about earthworms. Which of the following resources would provide the best information for her to use? , non-fiction books and science websites on earthworm adaptations
Which of the following precautions should be taken when working with animals and humans?
All answers are correct
Which of the following precautions should be taken when working with chemicals?
All answers are correct
Which of the following precautions should be taken when working with electricity?
All answers are correct
Which of the following precautions should be taken when working with mold and microorganisms?
All answers are correct
Which of the following should be included in the conclusion of a scientific paper?
All answers are correct
Which of the following should be included in the introduction of a scientific paper?
All answers are correct
Which of the following should be included in the results section of a scientific report?
All answers are correct
Fred notices that his shower is covered in a strange green slime. His friend Joe tells him that coconut juice will get rid of the green slime. Fred decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. How could Fred improve this experiment?
All could improve the experiment
Which of the following should be considered when designing an experiment?
All of the answers are correct
The career and job outlook in agriscience is..
All stated answers are correct
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. Is the dependant variable data Allen is gathering quantitative or qualitative? , Qualitative
In chemistry class
Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting would occur with the more active metals. He placed the following into 4 seperate beakers of water: (a) 1 iron nail, (b) 1 iron nail wrapped with an aluminum strip, (c) 1 iron nail wrapped with a magnesium strip, and (d) 1 iron nail wrapped with a lead strip. He used the same amount of water, equal amounts (mass) of the metals, and the same type of iron nails. At the end of 5 days, he rated the amount of rusting as small, moderate, or large. He also recorded the color of the water. What are the constants in this experiment? , All answers are correct
Motion
a basic proposal that brings business before the assembly
Concave bevel
a bevel which is hollowed or curved inward
Convex bevel
a bevel which is raised or curved outward
Shop
a building in which mechanical work is performed
Water
a colorless, odorless liquid essential for all forms of life
Working pressure
a continuous regulated pressure supplied to the oxyacetylene torch assembly
Rabbet
a cut or groove at the end of a board made to receive another board and form a joint
Simple machine
a device or machine that has only one or two parts such as a wheel or axle
Blade balance
a device used to balance a lawn mower blade to prevent excess vibration during operation
Switch
a device used to stop the flow of electrical current; used in controlling devices
Portland cement
a dry powder made by burning limestone and clay followed by grinding and mixing
Neutral flame
a flame with a balance of oxygen and acetylene
Oxidizing flame
a flame with a balance of oxygen and acetylene
Caburizing flame
a flame with an excess of acetylene in the mixture
Career Development Event
a hands-on team competition designed for FFA members to develop career-related skills
Common nail
a kind of nail with a flat head that is used in general construction
Compound machine
a machine, often large that is comprised of many simple machines
Fertilizer
a material that supplies nutrients to plants
Issue
a matter on which differences of opinion exist
Surveying rod
a measuring device to determine vertical distances in making a land survey or contour map
Form
a metal or wooden structure that contains concrete until it happens
Electrode
a metal welding rod coated with flux used in electric arc welding
Parliamentary procedure
a method of conducting meetings in an orderly manner
Concrete
a mixture of stone aggregates, sand and portland cement and water that hardens as it dries
Solder
a mixture of tin and lead used to faster together sheet metal and electrical connections
Alloy
a mixture or two or more materials
Circular saw
a motor driven power hand saw with a round blade
Tactor
a moving vehicle, usually with wheels or tacks with an engine that provides power to other equipment
FFA
a national organization for students enrolled in agriculture education that promotes leadership, growth and career success
Fitting
a part used to connect pieces of pipe to other pieces of pipe
Drawing
a picture or likeness made with pencil, pen, chalk, crayon or other instruments
Double inclined plane
a plane made by two bevels creating a point similar to that of an axe
Annual
a plant that completes its life cycle in one year or less
Biennial
a plant that needs two years to complete its life cycle
Monocot
a plant with one seed leaf
Dicot
a plant with two seed leaves
Prennial
a plants that needs more than two years to complete its life cycle
Benchmark
a point of predetermined elevation
Backsight reading
a reading taken on a point of known elevation
Foresight reading
a reading taken on a point of unknown elevation
Renewable resource
a resource provided by nature that can replace itself
Nonrenewable resource
a resource provided by nature that cannot replace itself
Sketch
a rough drawing of an idea, object or procedure
Kickback
a safety hazard that results when a saw blade binds in the material being cut resulting in uncontrollable throwing of the material or saw
Rip hand saw
a saw with lager teeth for cutting with the grain of wood
Crosscut hand saw
a saw with small teeth for cutting across the grain of wood
Hidden line
a series of dashes that indicate unseen edges
Hollow ground
a single inclined plane which is concave ground
Finishing nail
a slender nail with a small head used for interior trim work
Ignition
a spark that ignites the fuel and air mixture
Dado
a square or rectangular groove in the face of a board
Extemporaneous speech
a type of speech in which the speaker prepares ideas but does not memorize exact words
Prepared speech
a type of speech in which the speaker prepares the speech completely beforehand
Board foot
a wood measurement of 144 cubic inches
Operator's manual
a written description of how to safely use and maintain equipment provided by the manufacturer
In the early 1950s
a young researcher named Rosalind Franklin used X-ray diffraction imaging to produce a photograph of the DNA molecule. Two other researchers, James Watson and Francis Crick, used this information to develop a three-dimensional model of the DNA molecule. Their model of the DNA molecule was rapidly accepted by the scientific community following publication of their results. To a great extent, the acceptance of their model of the DNA molecule was based on: , the use of data on the DNA molecule that was collected before their research was begun.
The best term to describe the application of scientific principles and new technologies to agriculture is ________.
agriscience
Agricultural industry
all of the activities in producing and marketing food, fiber and forestry products to consumers
Ultimately
all scientific knowledge comes from: , Experimentation and Observation
Placement
an SAE in which students are employed in an agriculture related field
Production
an SAE in which students learn to raise and manage crops and livestock
FEMA
an agency focused on responding to natural and other disasters
EPA
an agency of the Federal government focused on environmental quality
Circuit
an electrical source and wires connected to a light, heater or motor
Scale
an instrument with all the increments shortened according to proportion
Supervised Agriculture Experience
an opportunity for students to develop knowledge and skills in agriculture-related fields while in supervised settings
Which step of the scientific method includes making necessary calculations
and determining if the information allows you to accept or reject the hypothesis? , Draw conclusions
"Twelve mice were sent through a maze
and the times (in minutes) to complete it are listed below. Find the range of these times.
"A timed puzzle was completed by 7 participants
and their completion times are given below (in seconds). What is the range of completion times?
Masonry
anything made of brick, stone, tile or concrete units held in place by masonry cement
Height of instrument
back site plus elevation
Which section of the scientific report contains the statement of the problem
background, and objectives? , Introduction
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. How can this experiment be improved? , All answers are correct
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. Identify the control group. , The subject sprinkled with the original itching powder
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. Identify the dependant variable. , The length of time itchy
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. Identify the experimental group. , The subject sprinkled with the experimental itch powder
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. Identify the independant variable. , The type of powder used
Hunter was told that a certain itching powder was the newest
best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported having itches for 45 minutes. What should Hunter's conclusion be? , The experimental itching power makes subject itch longer.
Brazing
bonding with metals and alloys that melt above 840 degrees F when capillary action occurs
The study and manipulation of living things or their component molecules
cells, tissues, or organs. , Biotechnology
Data that are descriptions of qualities such as shape
color, and gender. , Observation
Twist drill
common drill bit used for making round holes in wood and metal
The control and preservation of natural resources for present and future use
conservation
Bead
continuous and uniform line of filler metal
Direct current
current that flows in one direction continuously
Alternating current
current that reverses itself sixty time per second
Agricultural mechanics
design, construction, repair and maintenance of tractors, machinery and other structures used in the agricultural industry
Intake stroke
engine process of taking fuel and air into the combustion chamber
Which of the following is a testable hypothesis?
every member of the track team who uses the new athletic shoes will be able to beat his or her own best record.
Agricultural structures
facilities used in the agricultural industry
Which of the following strategies would result in a biased interpretation of the results of a scientific investigation?
failing to include experimental data that would cause other scientists in the field to call into question the conclusions of the research
Electricity
flow of electrons in a conductor
Horsepower
force needed to lift 550 pounds one foot in one second rating system of engine power displacement
Which domain of biotechnology does DNA identification and DNA fingerprinting
forensics fall under? , Diagnostic Research Biotechnology
The production and management of trees for lumber and other related commodities
forestry
Welding
fusing two pieces of material using a heat process most commonly used with metal and plastics
Acetylene
gas fuel used in acetylene welding
Oxygen
gas in the atmosphere that supports combustion used in some kinds of welding to promote burning of a hot flame
A section of the report of an experiment that includes data tables
graphs, and sentences that summarize any trends found in the data. , Results
biologist thought that fish raised in hatcheries lost their fear of predators. To test the idea
he placed 15 young hatchery trout and 15 wild trout of the same age and species into two separate but identical tanks. He divided each tank in half by inserting a clear divider made out of plexiglass. The biologist placed the trout on one side of the plexiglass divider and a large predatory fish - the northern pike - on the other side of the plexiglass. He then recorded the amount of time it took the young trout to move to the back of the tank away from the northern pike. The biologist found that the hatchery fish moved away much slower than the wild fish. Prior to starting the experiment, the biologist needed to fill out paperwork explaining procedures for using and caring for the fish in his experiment. What is the purpose for this paperwork?" , to ensure that his research animals will be treated humanely
biologist thought that fish raised in hatcheries lost their fear of predators. To test the idea
he placed 15 young hatchery trout and 15 wild trout of the same age and species into two separate but identical tanks. He divided each tank in half by inserting a clear divider made out of plexiglass. The biologist placed the trout on one side of the plexiglass divider and a large predatory fish - the northern pike - on the other side of the plexiglass. He then recorded the amount of time it took the young trout to move to the back of the tank away from the northern pike. The biologist found that the hatchery fish moved away much slower than the wild fish. Which of the following statements is the basis for the hypothesis that was tested?" , "The biologist thought that fish raised in hatcheries lost their fear of predators."
Harvester ants often strip a bush of all of its leaves. Some people believe this helps the plant grow thicker
healthier stems. In an experiment, a student stripped off all the leaves from a set of plants. In a second set of identical plants, the student allowed ants to strip off the plants' leaves. In order to improve this experimental design, it is most important to add a set of plants — , With its leaves left intact
Borderline
heavy solid black line drawn close to the outer edge of paper used to draw plans
A brief summary of the research paper or report. It includes a brief description of the problem
hypothesis, procedures, results, and conclusions. , Abstract
Agricultural equipment
implements used in the agricultural industry to produce plants, animals and other products
A sequence of precisley stated steps that describe how an experiment was done
including the materials and equipment used. , Procedure
A biologist has completed an investigation of the ecological effects of planting large areas with crops that have been genetically altered to prevent pest damage. In order for other scientists to properly evaluate this research
it is most important that the biologist publish which of the following types of information related to the study? , the specific methodology used to obtain the study's results
A scientist announces that she has discovered a strain of mice that does not develop cancer even after repeated injections with chemical agents known to cause cancer in normal mice. To demonstrate to the scientific community that the discovery is legitimate
it is most important that the scientist: , provide verifiable evidence to support her claim.
Bio means ________.
life
Ground
making an electrical connection between a piece of electrical equipment and the earth
Flux
material on an arc welding rod that cleans the metal aids in proper cooling and produces a gas shield for the weld
Inside diameter
measurement used to size a pipe based on a measurement taken from the interior walls of the pipe
Outside diameter
measurement used to size pipe based on a measurement taken from the exterior walls of the pipe
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. The average height of the plants in flat A was 12 cm, the average height of plants in flat B was 18 cm and the average hight of plants in flat C was 8 cm. Was John's hypothesis correct? , Yes
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. Was the data gathered in John's research qualitative or quantitative? , Quantitative
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. What is John's hypothesis? , If older compost is applied, then plan growth will be increased.
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. What is the dependant variable? , Height of plants
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. What is the independant variable? , Age of compost
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. What was the control in this experiment? , Flat C
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. What would be the most appropriate title for this experiement? , The Effect of Different Aged Compost on Bean Plant Growth.
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. Which of the following was a constant in this experiment? , All answers are correct
After learning about recycling
members of John's biology class investigated the effect of various recycled products on plant growth. John's lab group compared the effect of the different-aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: (a) Flat A: 450 g of 3-month old compost, (b) Flat B: 450 g of 6-month old compost, and (c) Flat C: 0 g compost. The plants recieved the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants in cm. Which of the following was not a constant in this experiment? , Age of compost
Ferrous
metal that is made with iron ore
Conduit
metal tube with individually insulated wires
Nonferrous
metals that do not contain iron
Mortar
mixture of portland cement, finishing lime and sand
The most valid and reliable test of the hypothesis
more pine seeds germinate after a forest fire, would include an experimental group of pine seeds that was recovered from a fire area and pine seeds that were — , Found before a fire
Compression stroke
movement of an engine's piston to squeeze or compress the fuel air mixture
Exhaust stroke
movement of the piston when expels burned gases from the cylinder
Resources found in nature that support life and produce fuel
natural resources
Agribusiness
non farm work or processes in the agricultural industry
Wildlife
nondomesticated animals that thrive in natural environments
A resource provided by nature that cannot replace itself
nonrenewable resource
A colorless
odorless liquid essential for all forms of life , water
Kerf
opening in board made by the cutting of a saw blade
____________ is any one of several procedures for transmitting information from one person to another. Writing reports
or participating in discussions in class are examples of this. , Communicating
A list of all books
papers, journal articles, and communications cited or used in the preparation of a report or scientific research paper. , Bibliography
Which of the following activities best exemplifies the practice of science as inquiry?
placing different objects in a tank of water to determine which ones float
Plumbing
planning, installing and maintaining systems of pipes and fixtures
Ratio
proportion of one component to another by weight or volume
Carburetor
provides fuel and air to the engine in appropriate proportions and volume
Mix
ratio of materials in concrete or mortar
Ream
removing the burns from the inside edge of cut pipe
A resource provided by nature that can replace itself
renewable resource
Natural resources
resources found in nature that support life and produce fuel
Pipe
rigid tube-like material
Ground fault circuit interrupter
safety device that prevents ground faults when operating power tools and using electricity
The specific set of individuals
selected from a population, to be subjects in an experiment. , Sample
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. What are the constants in this experiment? , All answers are correct
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. What is the dependant variable? , Time to emerge
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. What is the independant variable? , Type of perfume
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. Which of the following is JoAnna's hypothesis? , If the perfume contains Ester X, then bees will display agitated behavior.
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. Which of the following is a constant in this experiment? , Amount of perfume
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. Which of the following is a way to improve JoAnna's experiment? , All answers are correct
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. Which of the following is not a constant in this experiment? , Type of perfume
JoAnna read that certain perfume esters would agitate bees. Because perfume formulas are secret
she decided to determine whether the unknown ester X(which was known to agitate bees) was present in four different perfumes by observing the bee's behavior. She placed a saucer containing 10 mL of the first perfume 3 m from the hive. She recorded the time required for the bees to emerge and made observations on their behavior. After a 30-minute recovery period, she tested the second, third, and forth perfumes. All experiments were conducted on the same day when the weather conditions were similar; that is air temperature and wind. Which of the following is the most appropriate title for JoAnna's experiement? , The Effect of Various Perfumes on the Behavior of Bees
Lisa planted some tomatoes on the north side of her house and on the south side of her house. After three weeks
she noticed that the tomato plants on the south side of the house were much taller and stronger. She wants to know why this happened. What is a question Lisa couls ask herself to help solve the problem? , What is different about the growing conditions between the two sides of the house.
Object line
solid line in a drawing that shows the visible edge of an object
Extension line
solid lines showing the exact area specified by the dimensions
"For an experiment
students collect a bucket of water from a local marsh. The students fill five flasks with 500 mL of water from the bucket. One flask is sealed and set aside. Each of the other flasks is rapidly heated to 60ºC using a Bunsen burner. Each flask is kept at this temperature for 1, 2, 5, or 10 minutes and then sealed and quickly cooled to 30ºC using a tub filled with ice. The five flasks are allowed to stand at room temperature for five days. Students then examine a sample from each flask under a microscope and record the number of living organisms that are
In an experiment designed to test the effects of solutes on temperature
students label four beakers A, B, C, and D and add 50 mL of distilled water at room temperature to each. They then add 5 g of table sugar to beaker B, 10 g to beaker C, and 15 g to beaker D. No sugar is added to beaker A. The students measure the temperature of the contents of each beaker. After heating each beaker for the same amount of time on a hot plate at the same setting, the students measure the temperature again. The change in temperature is recorded. Beaker A is included in this investigation for which of the following reasons? , as a control to establish the standard against which temperature changes in the other beakers may be compared
Leadership
the ability to direct and guide others to accomplish a goal
Mechanical advantage
the amount that a machine increases force
A chemist is weighing the products of a chemical reaction. The research design requires that the experimental values collected be determined to a high level of precision. Which of the following will most directly affect the precision of the data the chemist collects?
the choice of equipment used for weighing the products
Conservation
the control and preservation of natural resources for present and future use
Polarity
the direction of electrical flow in the ac welding circuit
Power stroke
the engine process in which burning fuel expands rapidly but evenly to drive the piston downward
When preparing to heat a liquid in a beaker or flask on a hot plate
the first safety precaution that should be taken is to: , check the glassware for cracks or chips.
Photosynthesis
the food-making process of plants
USDA
the main agency of the Federal government that oversees agriculture
Biotechnology
the management of biological systems for the benefit of humans, including cloning, gene transfer and other technologies
Amp
the measurement of electrical flow in a conductor
Amperage
the measurement of electrical flow in a conductor
Watt
the measurement of electrical power voltage X amps
Volt
the measurement of electrical pressure
For many year
the medical community said the ulcers in the human stomach were caused by increased stress levels. Increased stress caused the ctomach to produce more acid; this, in turn ate through the mucus lining the stomach and damaged its tissue. In 1979, an Australian scientist named Robin Warren found some strange bacteria when he examined stomach tissue removed from an ulcer patient. Warren wondered whether there might be a relationship between the patient's ulcers and the bacteria. Warren found the same type of bacteria in the stomachs of other ulcer patients. Based on this finding, which hypothesis would best test a possible relationship between the bacteria and the ulcers? , If the bacteria are a cause of ulcers, then killing the bacteria in the stomach may decrease the number of ulcers.
For many year
the medical community said the ulcers in the human stomach were caused by increased stress levels. Increased stress caused the ctomach to produce more acid; this, in turn ate through the mucus lining the stomach and damaged its tissue. In 1979, an Australian scientist named Robin Warren found some strange bacteria when he examined stomach tissue removed from an ulcer patient. Warren wondered whether there might be a relationship between the patient's ulcers and the bacteria. What question could Warren have asked to start an investigation into a possible relationship between the bacteria and ulcers? , Do the bacteria in the stomach have anything to do with the patient's ulcer?
For many year
the medical community said the ulcers in the human stomach were caused by increased stress levels. Increased stress caused the ctomach to produce more acid; this, in turn ate through the mucus lining the stomach and damaged its tissue. In 1979, an Australian scientist named Robin Warren found some strange bacteria when he examined stomach tissue removed from an ulcer patient. Warren wondered whether there might be a relationship between the patient's ulcers and the bacteria. What would be the best type of information for Warren to gather for an investigation of a relationship between the bacteria and ulcers? , Whether the bacteria exist in other ulcer patients.
A scientist testing the affects of a chemical on apple yield sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall
the number of apples harvested from each forest is counted. Which of the following is the independent (manipulated) variable in the experiment? , The chemical
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Identify the control. , The section with no wax
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Identify the dependant variable. , Number of scratches
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Identify the independant variable. , Type of Floor Wax
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Identify the item(s) held constant. , All answers are correct
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. The 5 sections coated with Tough Stuff had a total of 12 scratches, the 5 sections coated with Steel Seal had a total of 23 scratches and the untreated sections had a total of 47 scratches. What should be the researcher's conclusion? , Tough Stuff was most effective at preventing scratches
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Was the data gathered in this research qualitative or quantitative? , Quantitative
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Which of the following would be an appropriate hypothesis? , All of the answers are correct
A shopping mall wanted to determine whether the more expensive "Tough Stuff" floor wax was better then the cheaper "Steel Seal" floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to each of the 5 test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. Five (5) other test sections recieved no wax. After three weeks
the number of scratches in each of the test sections was counted. Which of the following would be the most appropriate title for the experiment? , The Effect of Floor Waxes on the Number of Tile Scratches.
Revolutions per minute
the number of times a rotating shaft or blade turns or rotates in sixty seconds
Minutes
the official written record of a business meeting
Soil
the outer layer of the earth's crust that supports plant growth
Transpiration
the process by which a plant loses water vapor
Respiration
the process by which plants convert food to energy
Treading
the process of cutting threads on pipe
Hone
the process of finely sharpening a cutting edge with a bench stone or hand stone
Temper
the process of heating tool-grade steel followed by carefully controlled cooling to gain the desired degree of hardness
Forestry
the production and management of trees for lumber and other related commodities
Record book
the proper place to record all SAE inventory, deposits and expenditures
Scientists conducted a study of 5000 men over the age of 50 years. The participants filled out a questionnaire about various health issues. Based on the data
the researchers found that those participants who ate a high-fiber diet reported 25% fewer incidents of heart attacks. The scientists concluded that a high-fiber diet prevents heart attacks. The validity of this conclusion is questionable primarily because: , the research does not demonstrate a causal relationship between high fiber diets and a lowered incidence of heart attacks.
Plant science
the science of plant growth, care and management
Aquaculture
the science of producing aquatic plants and animals
Agriculture
the science of producing crops and raising livestock
Horticulture
the science of producing fruits, vegetables and ornamental plants
In 1928
the scientist Alexander Fleming was trying to grow the bacterium Staphylococcus, and by chance, discovered that it would not grow in the presence of a mold that he named Penicillium. In 1939, Ernst Chain and Howard Florey purified penicillin, and in 1941, penicillin was first used to treat bacterial diseases. In 1945, Alexander Fleming, Ernst Chain, and Howard Florey received the Nobel Prize in medicine for the discovery and isolation of penicillin. These facts show that — , The scientific process often requires the efforts of many people working together
present. Using this information
the students calculate the total number of organisms in each flask. It would be most important for students to follow which of the following safety practices during this experiment?" , Wear safety glasses when heating and cooling the flasks.
present. Using this information
the students calculate the total number of organisms in each flask. The dependent variable in this experiment is:" , the number of living organisms present in each flask.
Level
the surveying instrument
Agricultural mechanization
the use of complex machines, often powered to do work in the agricultural industry
Agricultural power
the use of engines, motors and other sources of power to do work in the agricultural industry
Cuthbert is experimenting with breeding a species of flower. He thinks that the alleles that control bloom color in this species are in a cominant-recessive relationship to each other. His hypothesis: if a plant has both the red allele and the white allele
then the flower will only make red blooms. Which of the following experimental results would lead to Cuthbert rejecting his hypothesis. , He crosses a red-blooming plant with a white blooming plant and gets 25% red-blooming plants, 50% pink blooming plants, and 25% white blooming plants.
Testable questions have all of the following characteristics EXCEPT
they always produce a clear answer once tested.
A fertilizer company claims that their fertilizer causes rose bushes to produce more flowers. To support this claim
they set up an investigation. They added the recommended amount of fertilizer to 100 rose bushes in a greenhouse, and then they counted the number of flowers that developed on each plant. The number of flowers on each rose bush ranged from 28 to 36. The mean number of flowers on each plant was 33. A gardener was skeptical of the company's claim. Which statement provides the best reason to be skeptical? , The research was conducted without a control.
John thinks that an energy drink will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case
they're supposed to staple a set of papers). Group A is given the energy drink to drink while they work. Group B is not given the energy drink. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Identify the control group. , Group B
John thinks that an energy drink will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case
they're supposed to staple a set of papers). Group A is given the energy drink to drink while they work. Group B is not given the energy drink. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Identify the dependant variable. , The stacks of paper made
John thinks that an energy drink will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case
they're supposed to staple a set of papers). Group A is given the energy drink to drink while they work. Group B is not given the energy drink. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Identify the experimental group. , Group A
John thinks that an energy drink will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case
they're supposed to staple a set of papers). Group A is given the energy drink to drink while they work. Group B is not given the energy drink. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. Identify the independant variable. , The energy drink or lack thereof
John thinks that an energy drink will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case
they're supposed to staple a set of papers). Group A is given the energy drink to drink while they work. Group B is not given the energy drink. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. What should John's conclusion be? , The energy drink did not increase the productivity of workers
Crosscut
to cut across the grain of wood
Vote
to give members the right to express approval of or opposition to a particular action
Fusion weld
to join paths by melting them together
Raheem wanted ti determine if ice made soda-pop lose its fizz. He put 100 mL of Molly's Root Beer into each of 15 identical water glasses. To three of the glasses he added 1 ice cube each
to the next three he added 2 ice cubes each, to the next three he added 3 ice cubes each, and to the fourth set of three he added 4 ice cubes each. He used identical ice cubes. To a fifth set of 3 glasses he added no ice cubes. Raheem then measured the time it took for the root beer to go flat or stop releasing bubbles. How many repeated trials were conducted? , 3
Raheem wanted ti determine if ice made soda-pop lose its fizz. He put 100 mL of Molly's Root Beer into each of 15 identical water glasses. To three of the glasses he added 1 ice cube each
to the next three he added 2 ice cubes each, to the next three he added 3 ice cubes each, and to the fourth set of three he added 4 ice cubes each. He used identical ice cubes. To a fifth set of 3 glasses he added no ice cubes. Raheem then measured the time it took for the root beer to go flat or stop releasing bubbles. What are the constants? , All answers are correct
Raheem wanted ti determine if ice made soda-pop lose its fizz. He put 100 mL of Molly's Root Beer into each of 15 identical water glasses. To three of the glasses he added 1 ice cube each
to the next three he added 2 ice cubes each, to the next three he added 3 ice cubes each, and to the fourth set of three he added 4 ice cubes each. He used identical ice cubes. To a fifth set of 3 glasses he added no ice cubes. Raheem then measured the time it took for the root beer to go flat or stop releasing bubbles. What is the dependent variable? , Time it took for the soda to go flat
Raheem wanted ti determine if ice made soda-pop lose its fizz. He put 100 mL of Molly's Root Beer into each of 15 identical water glasses. To three of the glasses he added 1 ice cube each
to the next three he added 2 ice cubes each, to the next three he added 3 ice cubes each, and to the fourth set of three he added 4 ice cubes each. He used identical ice cubes. To a fifth set of 3 glasses he added no ice cubes. Raheem then measured the time it took for the root beer to go flat or stop releasing bubbles. What is the independent variable? , The number of ice cubes
Raheem wanted ti determine if ice made soda-pop lose its fizz. He put 100 mL of Molly's Root Beer into each of 15 identical water glasses. To three of the glasses he added 1 ice cube each
to the next three he added 2 ice cubes each, to the next three he added 3 ice cubes each, and to the fourth set of three he added 4 ice cubes each. He used identical ice cubes. To a fifth set of 3 glasses he added no ice cubes. Raheem then measured the time it took for the root beer to go flat or stop releasing bubbles. What was the control? , The glass with no ice cubes
Agriscience
using new technologies in the production of food, fiber and shelter
Shielded metal arc welding
welding with electrical power as a source of heat using rods and flux that forms a gaseous shield around the molten metal until it solidifies
If a student needs to do research on heredity for a science project
which of these sources is the most reliable resource? , A scientific journal
When dealing with bacteria growth over time
which type of graph is appropriate? , Line graph
Adult stem cells are ________
while ________ stem cells are ________. , pluripotent, embryonic, totipotent
Nondomesticated animals that thrive in natural environments
wildlife
Gauge
with sheet metal a thickness scale used to identify the thickness of metal under one fourth inch