BIOLOGY
Which of the following biomes does not maintain an average temperature between 20 and 30°C
(Picture/chart table) Temperate deciduous forest
in a well designed experiment, ___ independent variables change
1
How much energy is passed on from one trophic level to the next in a food chain?
10%
A patient should pursue additional diagnostic test if cold symptoms last longer then which time period?
10-14 days
lead (Pb-208) is the heaviest stable isotope known. it had an atomic number of 82. how many neutrons does Pb-208 have?
126
how many protons, electrons, and neutrons are in an isotope of magnesium-25 that has an atomic number of 12?
12protons 12 electrons 13 neutrons
how many neurtons are in the following isotope?
15
Based on the graph below, what is the total number of cases of both MRSA and MSSA in the year 2005?
1800 cases
During which time. Did we experience the greatest increase in the number of cases of all infections?
2001 -2002
after 2 half lives have passes, how much of the original c-14 sample is still present?
25%
annette was given a dose of radioactive iodine for a test on her thryoid. the half life of the iodine is 8 days. how much of the original iodine will be left in her body after 16 days. (that would be 2 half lives)
25%
The effect of temperature on the rate of action of an enzyme is represented in the graph that is showing. The optimum temperature for the action of this enzyme is:
27°C
Which equation below is the correct balanced equation for this reaction? Fe+Cl>FeCl3
2Fe+ 3Cl2 > 2Fe Cl 3
In this reaction: 2N2+3H2 > 2NH What are the reactants?
2N2+3H2
How many valance electrons does carbon have?
4
what is the maximum number of covalent bonds that can form between a single carbon atom and 1 or more hydrogen atoms
4
Humans have________ chromosomes in most cells.
46
Destroying the rain forest leads to a great loss of biodiversity since it is home to __________of all of the species on earth
50%
Use the chart showing here and your knowledge of enzymes to answer this question. At what temperature would enzymes C most likely be denatured?
63
basic, or alkaline, solutions have pH values above ___
7
the neutral point on the pH scale is __
7
normal human blood has a pH of ___
7.4
If an energy pyramid shows the producers provide 8000 cal, how many calories will be provided by the secondary consumers?
80 kcal
Which of the following is an example of an independent variable?
???
What needs to be done after you test your hypothesis?
????
Which molecule represents an enzyme functioning in this solution?
A (hint: big orange puzzle piece)
Dissecting microscope
A ____________doesn't have high power magnification but it provides a wide area of magnification so as to look at larger portions of the object.
What is the difference between prokaryotes and eukaryotes?
A eukaryote has a nucleus
Sucrose, table sugar, is formed from the bonding of which combination of monosaccharides?
A glucose molecule and a fructose molecule
Populations include which of the following
A group of individuals of the same species
Which of the following examples would demonstrate a population at carrying capacity
A herd of cattle in an healthy pasture
True
A lab technician could use trace evidence of fibers to determine a link between the rug in the dumpster and the victim. Forensics
Secondary succession begins with
A layer of soil
How is a lytic infection different from a lysogenic infection?
A lytic infection uses the cell to reproduce viral DNA to form new viruses that burst from the cell
Mass
A measurement reads 104.6 KG. This is a _______________measurement
Which of the following is not part of a protein?
A phosphate group
What is a hypothesis?
A question about nature and how it works
Which of the following is an accurate description of how a vaccine works to prevent viral infections?
A small dose of the virus is injected so that the body learns to recognize the antigens
23 CM
A student is attempting to measure the length of his hand span. He measures the distance and it is 2.3 DM? How many CM would that be?
How does bacteria cause illness or disease?
A. Bacteria feed on healthy tissue B. Bacteria releases toxins into the tissue E. A and B only
Viruses are made up of which of the following components?
A. Capsid C. DNA or RNA E. A and C only
How does the body benefit from the normal flora of bacterial cells? Choose all that apply
A. Compete with the invading pathogens for nutrients in space C. Releases toxins it kill invading bacteria D. Releases vitamins into the body that humans are not able to produce
Which of the following has contributed to the increase of antibiotic resistant bacteria? Choose all that apply
A. Overuse of antibiotics for illness not caused by bacteria B. Not following directions when taking prescription anabiotic's D the increased use of antibiotics on my stock in poultry to reduce the risk of infection
The immune response of the body can cause which of the following symptoms?
A. Swelling B. Pain C. Inflammation D. All of the above
Why are viruses unpredictable and difficult to treat?
A. The genetic material can alter B. The variations in proteins on the outside of the virus C. Both A and B
Which of the following problems could be solved following the steps of the scientific method?
A. Trying to figure out who to take to prom B. Determining the best route to take to work C. Choosing which brand of detergent works best D. All of the above
Why is it difficult to develop vaccines and use them to prevent viral infections?
A. Viruses can change over time and are no longer recognized B. The protein coats are very specific to each type of virus C. More infections forms can emerge D. All of the above
Antibiotic's have been used in agriculture for many years. What purpose is in antibiotic use in livestockstock?
A. to control and prevent disease C. Increased weight gain D. Both A and C
In the series of metabolic reactions, reactant R is converted into product A, and enzyme X then catalyzes the conversion of product D in the products B and D, product B is converted to product C. Assume the product C inhibits enzyme X and that product C is not consumed into a subsequent reaction. The rate of production of which product is least likely to decrease?
A.) A
Centrifuge
A/n __________is used to separate mixtures by spinning the sample and letting heavier particles be pulled to the bottom of the container.
Which of the following is a high energy molecule that delivers energy to cells?
ATP
If a reaction has a positive heat of reaction, it __________ heat as it proceed
Absorbed
Aquatic species that are capable of making their own light can be found in the __________zone
Abyssal zone
electricity
According to the EPA, where do most greenhouse gases come from in the United States
____________energy is the energy needed to start a chemical reaction
Activation
Whe should the doctor prescribe anabiotic's for an illness?
After the doctor he's taking a culture and tested positive for the presence of a bacteria
True
All DNA and microbes should be handled as if they cause infections.
Estuaries provide which of the following
All of the above
How can a graph be useful when answering questions on the test?
All of the above
What type of evidence can be collected from the gloves to determine and link to the victim or suspect? Forensics
All of the above
How do cancer cells cause problems with healthy cells?
All of the above Cancer cells take nutrients, oxygen, and blood supply away from the healthy cells. Tumor formation causes damage to surrounding tissues Cancer treatments damage healthy cells as it damages the cancer cells
Which of the following activities contribute to the levels of carbon dioxide in the atmosphere?
All of the above Driving a car Turning on the lights Keeping your computer on at all times
Which of the following are considered to be eukaryotes?
All of the above Fungus, plants, animals
How have humans managed to increase the carrying capacity on earth?
All of the above More efficient method for food production Design techniques for cleaning water Improved transportation to make us all more connected
What happens during early succession that allows growth to proceed to the next stage?
All of the above New types of seed enter the environment The early grasses will compete with field grasses for resources As early grasses die, they decompose to add to the soil layer
Following the cleanup efforts after an oil spill, you still may have problems associated with which of the following?
All of the above Residual oil, toxins entering the food chain, unknown lasting problems associated with untested products
Which of the following prevents succession from taking place
All of the above Cutting grass, repaving the street, burning the field
Which of the following is an example of a density independent limiting factor?
All of the above Natural disasters, weather, human disturbances
Which of the following is an example of how you can conserve resources?
All of the above reduce recycle reuse
As animals and plants die, they are broken down by decomposers and nitrogen is released as ammonia, this process is called
Ammonifcation
When sodium and chlorine combine, sodium gives up one electron to fill up chlorines outer level. The result is:
An ionic bond with sodium becoming a positive ion and chlorine becoming a negative ion
__________enzymes take smaller molecules and make larger ones
Anabolic
Sister chromatids separate and begin to move apart during________.
Anaphase
False
Answers that use qualifiers are always correct.
How do antibiotics kill bacteria?
Antibiotics prevent bacteria from building cell walls
Archimedes was asked by King hero to find out if he's ground was really made of gold. He knew the gold would be happier if it was an alloy and not pure gold. He got into his back and realized that when he got in, the water level rose. He knew then how to tell if the crown was pure gold. He figured out if it equal weight of pure gold raised the water level the same as the crown did, it would be pure gold he proved it was not gold. It is said that he ran through the street naked because he was so excited about his discovery. Is this basic science driving applied science or applied science driving basic science?
Applied science driving basic science
Coenzymes attached to the active site of the enzyme and ____________considered a substrate
Are not
Ming is having trouble sleeping and decides to participate in a study to determine whether a certain medication helps people sleep. There are 30 volunteers, each of whom is assigned to one of two groups. Volunteers in group one are given the medication, and volunteers in group 2 are given a placebo. Which step is important in order to ensure scientifically valid results?
Assign the subjects to groups at random
Luminal
At a crime scene, what tests could the lab technician use to find traces of blood in the area? Forensics
Which system in the biosphere includes the components that make up the air surrounding the earth?
Atmosphere
Here are some of the stages of an enzyme controlled reaction. An enzyme substrate complex is represented by the diagram:
B (A green and yellow complete circle)
Which of the following examples would demonstrate exponential growth
Bacteria growing in a nutrient broth
74-90.5 MPH
Based only on the information in the tables, for the majority of the hurricanes that will strike the coast near Texas and Mexico, what is the most likely wind speed range, in miles per an hour?
The main difference between basic science in applied science is_________
Basic science increases understanding and knowledge and applied science create solutions
Leonardo da Vinci was fascinated by the animal anatomy. He was especially taken with the birds and how their anatomy enabled them to fly. He said he birds Andrew many pictures of the anatomy of the wing birds. This led him to try to devise a human powered mechanical flight device. He made sketches a very designs and also varies machines it would help me and fly. Leonardo da Vinci used____________
Basic science to drive applied science
Which activity is not involved in keeping balance within the body?
Bathing and washing your clothes every day
Which of the following is NOT a material that can be placed in the recycle bin at home or school?
Batteries
Fireflies vary in the flashing patterns they use to attract mates. This is an example of which type of isolation?
Behavioral isolation
________ is a tumor that remains in its original location
Benign
6.0 and 6.5
Biologist studying the effects of pH level on temple development gather data and recorded it in this graph. In the graph, between which two consecutive pH levels is there the greatest difference in the number of tadpoles?
C. Stonefly 0 crayfish 12 blackfly 8 leach 3
Biology students gather samples from a local streaming conclude that it is extremely polluted. Which table most likely reflects the data gathered by the students?
A ___________is a large geographic area that has the same major forms of life in a particular climate-such as deserts forest in prairies
Biome
______Is a large geographic area that has the same major forms of life and has a particular climate-such as a desert forest or prairie
Biome
__________Is it example of a prokaryotic cell
Blue-green algae
All of the following biomes receive less than 150 cm average precipitation per year except________
Boreal forest
Structurally, viruses and bacteria are similar in that_______
Both contain genetic material
structurally, viruses and bacteria are similar in that_________
Both contain genetic material
Susie has decided that she wants to see how different salt concentrations affect the cytoplasm of the cell. She does research and plant cells and plant cell components....................... How did Suzy make the 10% salt solution?
By adding 10 g of salt to 100 mL of water
Suzy has decided that she wants to see how different salt concentrations affect the cytoplasm of the cell. She does research on plant cells and plant cell components. Suzy decides to use an onion as a source of plant cells because they staying well. A thin layer of the onion is peeled off and placed on a slide. She add one drop of distilled water and one drop of iodine stain and views the cells under a microscope then she drew and identified observe structures. Next she prepared a 5% salt solution - she also prepared a 10% salt solution. She added a few drops of the 5% salt solution to one side of the slide and she look at the slide again under the microscope. She also drew and identify the structures. She repeated the steps with the 10% salt solution. How did Susie make the 10% salt solution?
By adding 10 g of salt to 100 mL of water
How do enzymes speed up chemical reactions?
By reducing activation energy
Which energy pyramid accurately represents the amount of energy in a desert food chain including cactus, hawk, insects, and snake
C. Hawk Snake Insect Cactus
Which molecule is not associated with the reaction occurring in a solution?
C. (Green) (Picture with puzzle pieces and green puzzle pieces don't fit to anything)
Which of the following compounds is an organic compound?
C2H6
In aerobic respiration, glucose combines with oxygen to your carbon dioxide and water. What is the balance chemical equation for this reaction?
C6h12o6 +6O2+6H2O
Which of the following functional groups is carboxyl?
COOH
Plants get carbon from what chemical in the air
Carbon dioxide
Which of the following makes up the largest percentage of the greenhouse gases in the atmosphere?
Carbon dioxide
What are the reactants in the photosynthesis equation?
Carbon dioxide and water
Match the functional group with the correct name:
Carboxyl COOH Hydroxyl OH Amine NH3
Animals that eat other animals are called____
Carnivores
The part of the cell that functions to maintain homeostasis relative to the cells environment is the__________.
Cell membrane
_________ during cytokinesis in plant cells.
Cell plate forms
All of the following EXCEPT ____________ are part of the cell theory
Cells were proceeded by viruses
True
Celsius degree and a kelvin degree have the same magnitude. Remember that to change from Celsius to Kelvin take C +273 equals K
Milligram
Chan wants to determine how much the mass of fungus growing on a nutrient Agar plate changes over an eight hour period. What is the most appropriate unit of measurement for him to use?
Which of the following viruses can remain dormant in nerve cells in reemerge as shingles later in life?
Chickenpox
The __________through a series of chemical reactions captures solar energy (sunlight) and converts it to sugars and carbohydrates (chemical energy) in which it is stored until needed.
Chloroplast
When a cell is not dividing, DNA is a threadlike form called__________.
Chromatin
During cell division, DNA is in a condensed form called__________.
Chromosomes (Chromatin is an option also - but chromatin is DNA IN A THREADLIKE FORM)
The average, long term weather patterns of a region describes the_____
Climate
Herds of animals demonstrate _______dispersion
Clumped
Which non-renewable resource comes from plants that lived millions of years ago
Coal
The is all the organisms ( like plants and animals) that live together in certain defined area.
Community
Which of the following will provide the most accurate results for an experiment?
Compare a large sample size from multiple trials
A__________protein source is one that provide all of the essential amino acids needed for the body to make the proteins it needs
Complete
Which of the following characteristics are found in a virus?
Contains DNA
The part of an experiment that is established to determine what happens under normal conditions.
Control
In an experiment, one group that is tested does not experience any change in variables that are being studied. What is that group called?
Control group
True
Correct spelling and punctuation are important component in technical writing piece
Which of the following is an example of a dependent variable?
Counting the number of seeds sprout in 10 different containers that receive different types of fertilizer
Cosmetics often contain gyycerol, which has three identical functional groups. Which type of bond hold these functional groups together?
Covalent
Which of the following methods can be used to test A hypothesis?
D all of the above A. Perform an experiment in a lab B.Perform the old research on behaviors and nature C. Collect data and repeat experiments
Which of the following can cause an enzyme to be denatured?
D. All of the above
What are the possible causes for the increase in it antibiotic resistance?
D. All of the above A. Too many antibiotic prescriptions for human illness B. Overuse of antibiotics in livestock C. Improper use of anabiotic's
All living things contain a blueprint for their traits in the form of________
DNA
All living things contain a blueprint for their traits in the form of_________
DNA
True
Data tables and graphs can summarize important information that is included in the reading passage.
Bacteria can also return nitrogen to the atmosphere as nitrous oxide or nitric oxide it in a reaction called
Denitrification
The part of the experiment that is measured to determine the effects of the experiment
Dependant variable
_____Is the study of the relationship between organisms and their environment
Ecology
The interactions between a community of living things and it's physical environment make up an
Ecosystem
What are all of the resources in organisms in one environment collectively called?
Ecosystem
What level of organization best describes a group of living organisms and their abiotic environment
Ecosystem
Which of the following is an example of a quantitative observation?
Eight geese flew in a V formation
West decided to grow some peppers in a pot on his deck. He watered the peppers and make sure they received plenty of sun. When the peppers were ripe he was able to pick them. The process that led to the growth of the pepper was___________
Endothermic because the peppers have stored energy that will be used when they are consumed
When energy is absorbed or any chemical reaction, the reaction is classified as___________
Endothermic chemical reaction
What happens when the bond between phosphate groups of ATP breaks, changing it to ADP?
Energy is released
Which of the following is not a focus area for the task force dealing with anabiotic resistance?
Enforce restrictions for anabiotic you
Hydrogen peroxide is a chemical found in many household medicine cabinets. It is also a byproduct of cellular metabolism and aerobic organisms. The reaction showing here occurs in the cells to prevent the accumulation of hydrogen peroxide. In this reaction, catalase functions as a_________
Enzyme in the breakdown of hydrogen peroxide (Hydrogen peroxide BREAKSDOWNS hair and makes it blond)
A student placed groups of seeds in a variety of temperatures ranging from 0 to 50°C. A difference in the rate of germination in the groups at different temperatures was most likely due to the effect of temperature on_________
Enzymes
This ecosystem contains a mixture of salt and freshwater where river flows into the ocean
Estuary
Organisms that contains cells that have a nucleus are called________
Eukaryotes
Which of the following is not one of the three ways water returns to the ocean
Evaporation
The process of adapting or species change in overtime is called_______
Evolution
The process of substances leaving a cell is__________.
Exocytosis
If a reaction releases energy or heat, it is called a _________ reaction
Exothermic
When stored energy is released or given off during a chemical reaction, the reaction is classified as an__________
Exothermic chemical reaction
The cell membrane, also called the plasma membrane, has several features that enable the cell to carry on life processes. Which of the following best describes the plasma membrane in animals?
FLEXIBLE, allows only selected molecules to cross, DOUBLE layer of phospholipid
The development of new anabiotic's is increasing in order to keep up with the emergence of new strains of resistant bacteria.
Falls
A polypeptide is formed when less than five amino acids joined together with peptide bonds
False
A prokaryotic cell has membrane-bound organelles
False
A theory in a law or the same thing
False
All bacteria is harmful
False
All living things contain the same amount of DNA
False
All prokaryote cells contain a cell membrane, nucleus, and chloroplasts.
False
Anabiotic resistance is limited United States.
False
Biotic are the nonliving parts and abiotic are the living parts of an ecosystem
False
Cellulose is primarily used by plants as an energy source
False
Changing only one amino acid in a polypeptide chain with hundreds of amino acids will not have an adverse effect on the protein
False
During cellular respiration, carbon dioxide CO2 is used by plants to make carbohydrates
False
Fats are usually a plant origin and oils are usually of animal origin.
False
For a healthy diet and humans, eating saturated fat is preferred over eating unsaturated fat's.
False
Human activity rarely prevents succession from taking place
False
In 1977, the FDA ban the use of antibiotic's for production purposes.
False
In older people the cell cycle speeds up as they age.
False
Lipids can be recognized because they are all liquid at room temperature
False
Most bacteria are considered infectious.
False
Nitrogen that can be used directly by plants is called usable nitrogen
False
Nutrition guidelines state that adult should have more than 70% of their daily diet calories from fat.
False
Observation is based only on what we can see
False
Of the antibiotic prescriptions given for upper respiratory illness, 80% are necessary based on the guidelines provided by the CDC.
False
Plant cells and animal cells are all prokaryotes
False
Producers are organisms that breakdown dead organic material and inorganic matter, like bacteria and fungi
False
Prokaryote cells have many specialized structures
False
Structural diagrams show the actual shape of a molecule.
False
The energy for life primarily drives from the moon
False
The immune system only responds to viruses.
False
The mean system only responds to viruses
False
Water like any other molecule will always move or diffuse from the region of lower concentration to a region of higher concentration.
False
CH3 COCOOH (pyruvic acid) + C2H28N7O14P12 > CO2 + CHOH ETHYL Alcohol ........... What process does this equation represent?
Fermentation
What is the least common cold symptoms that people experience?
Fever
What are graphical representation of relationships between animals and plants in an ecosystem collectively called?
Food web
Which of the following best describes a pathogen?
Germ
What is the name of the CDC campaign to educate the public on the importance of proper antibiotic resistance?
Get smart
Starch is a polysaccharide made up of thousands of _____________molecule
Glucose
Starch is a polysaccharide made up of thousands of _____________molecules
Glucose
Which of the following is not a polysaccharide?
Glucose
Fats and oils are made by adding three weak acids to_______
Glycerol
Which of the following is an example of a pioneer species for an area undergoing secondary succession?
Grasses
Which of the following is NOT a source of air pollution?
Ground water
An example of a top predator would be_______
Hawk
Which of the following uses the most energy each year in American homes?
Heating rooms
Which statement about hemoglobin is not true?
Hemoglobin is composed of two proteins
Liver
Hepatic deals with which organ in the body ?
Maintaining a stable internal environment despite changes in the external environment is called___________.
Homeostasis
_________is the maintenance of a stable internal environment
Homeostasis
Which of the following questions would basic research be used to answer?
How do you dragonflies reproduce
Lydia works in a flower shop after school. She notices that the hydrangeas in container one have pink blossoms........... Lydia most likely conducted her investigation to answer what question about hydrangeas?
How does the chemistry of the soil affect the color of hydrangea blossoms?
.45G
How many G are in 45 CG?
24,300 ml
How many ML are in 24.3 L?
.095 m
How many meters are in 9.5 CM?
All of the earths water, including both surface (examples oceans, seas, rivers, rake, and streams ) and subsurface water/Ground water are called______
Hydrosphere
Which set of words will correctly complete the following statement: ________ is a testable statement about the world that can be supported or refuted by new scientific evidence, where as__________ is it established, tested explanation of a phenomenon that is supported by current evidence.
Hypothesis; theory
A_______ is one in which the concentration of dissolved particles in the water outside the cell is lower than the concentration inside the cell.
Hypotonic solution
A theory is different from a hypothesis because:
I theories except it is true because of the accumulation of supporting evidence
A standard unit as a basis for comparison
If a scientist wanted to create a new system of measurement, the first thing needed it would be:
False
If all of the above is an answer choice, you should always choose that as your answer.
Overheating
If hyperactive means overactive, what is someone with hypothermia suffering from?
Which of these species might be classified as a pioneer species
Iichen
Transmission electron
In a _____________microscope, the electron beam is accellerated by an anode, focused by electrostatic an electromagnetic lenses, and transmitted through the specimen that is in part transparent to electrons and in part scatters them out of the beam.
True
In technical writing, a get to the point type of writing style is used
True
In technical writing, the audience is well defined and is interested in the topic without the writer happen to draw them into the writing.
France
In what country did the metric system originate
1800s
In which time did the US make the metric system excepted as a system of measurement passing the metric act?
Which of the following does NOT help conserve the biodiversity of the biosphere?
Increase deforestation efforts (this is a trick question- deforestation is tearing down a forest)
The part of an experiment that the scientist changes in order to test the effects.
Independent variable
Ribonucleic acid's (RNA) primarily act as________
Information carriers
Which of the following is NOT an example of a predator/prey relationship?
Insects and flowers
Which of the following is NOT a part of mitosis?
Interphase
Species must be able to tolerate changes in temperature and water levels in the _______zone
Intertidal zone
What is the primary direction of water movement when a cell is placed in a hypotonic solution?
Into the cell
Which is the least likely trait of an organic molecule?
Ionic bonds are present between the atoms
Gas chromatography
Is a way of separating chemical substances from a next sample by passing the sample, carried by moving stream of gas, through a tube packed with a finely divided solid that may be coated with a liquid film.
When the cell is not dividing, DNA has all of the following characteristics EXCEPT_________.
Is dispursed throughout the entire cell
What is a hypothesis?
It is a statement of what the researcher things will happen in an experiment
False
It is acceptable for students to do bloodwork any modern biology laboratory.
False
It is acceptable to hold a specimen to view it completely rather than pin it to a dissection pan.
False
It is acceptable to place metal objects such as aluminum foil in the microwave
Why is topsoil considered a non-renewable resource?
It is destroyed by erosion and pollution at a faster rate than it can be replaced
True
It is important not to burn plants with Allergan-type oils such as poison ivy and poison oak.
True
It is important to know the difference between edible and non--edible plants.
True
It is important to know the difference between edible and non-edible plants.
True
It is important to provide adequately sized cages for any animal kept in a biology lab
True
It is important to sterilize bacteria cultures and petri dishes prior to disposal
If a species is introduced into an environment where it has no predators, what will happen to the population?
It will show rapid growth
Which of the following would NOT reduce the amount of electricity you use at home?
Keeping the thermostat temperature really low in the summer (this is a trick question keeping the thermostat lower the summer is running the AC high)
Disinfecting the lab table before and after the transfer
Keiko transfers samples of bacteria from a culture tube to several petri dishes. Which technique should she use to minimize contamination of the culture?
The distance between two points
Length is_______
A reaction is _________likely to occur if the activation energy requirement is higher
Less
Biology is the study of_____
Life
All of the following are examples of disaccharides except
Lipids
The ___________model of how an enzyme functions describes how the enzyme fits the substrate like a puzzle piece fits a puzzle
Lock and key
384,400 KM, Mark is correct
Mark and Sheri were arguing about the distance from Earth to the moon. Sheri says it's more than 3 million km. Mark doesn't agree. They look up and find out the distance is 384,400,0000 m. How far is that in kilometers? And who is correct? (In science, and commas are not used to separate three numbers as they are in United States. Some countries use commas as decimal points (France) The spaces in the answers below are we are commas would be in the United States.)
False
Mass and weight are measuring the same thing.
Several students in a biology lab tested mealworms preference for damp or dry conditions. The student plays 50 mill worms one by one in the middle of a layer paper towels with a damp area and a dry area. The meal worms were allowed to move freely over the paper towels for 10 minutes. After 10 minutes the students noted the location of each meal worm. The data is summarized below: Which conclusion best supports the data collected in both experiments?
Meal worms are more strongly influenced by food then by damp or dry conditions.
_________Involves all the chemical reactions involved in maintaining life processes
Metabolism
When the chromosomes are completely aligned, the cell is in__________.
Metaphase
____________is when cancer spreads to other parts
Metastasize
Any living organism that cannot be seen by the naked eye
Microbes are____________
False
Modern microscopes do not use any of the principles that Anton van Leeuwenhoek used in earlier ones.
Which of the following is NOT a result of increased biodiversity in an ecosystem
More diversity decreases stability among living things
Which of the following is NOT a characteristic of all living things?
Movement
Volume
Mrs. Fisher asked her student to record his measurements on the board. This is what he wrote: 14.5 ML, 15.6 ML and 14.8 ML. These are ____________measurements
Which part of our body is glycogen found and used the most?
Muscles
An example of _________is the relationship among protist that live in the intestines of termites
Mutualism
Anabiotic resistance in bacteria resulted from?
Natural selection
Which oceanic zone contains the highest number of photosynthetic plankton and algae
Neritic zone
Why should scientists continue to test and research current theories?
New experimental data helps increase understanding of current theories or it may disapprove them and lead to new theories
______Is the role/job of an organism has in a community
Niche
__________Occurs when two or more species divide resources in order to avoid competition
Niche partitioning
A _____________is the full range of physical and biological conditions in which an organism lives in the way in which the organism uses those conditions
Niche???????
in a water molecule, which atom has the partial negative charge?
O
Which of the following is not an example of applied science?
Observing and recording data regarding tide patterns in the ocean
False
On the ACT test, you should not gas because you were penalized for wrong answers.
Essay question: Antibiotic resistance has been identified as a major health right across the globe. A task force has been created to analyze the problem and come up with possible solutions. As a result of the findings of the task force, several guidelines have been established with recommendations for antibiotic use in human medicine and agriculture. Should the FDA go a step further and restrict the use of antibiotics unless absolutely necessary? In other words, should antibiotics only be used in cases were definite need has been established through diagnostic test that have been identified for the presence of a bacterial population? Explain whether you believe existing guidelines are enough or new restriction should be enforced. Provide two pieces of evidence from the lesson to support your argument. I believe the existing guidelines for the use of anabiotic's is not enough and that new restriction should be enforced
One reason I believe this is because the trend an antibiotic resistant is widespread in general in nature. If the problem was limited to one part of the world or one particular bacteria it would not be alarming. The cases of MSSA and MRSA resistant to antibiotics was 800 in 2001 and it is grown to 1800 in 2005. Another reason is the unnecessary use in agriculture and animals for production purposes. Important in a biotics necessary to treat human illnesses should not be used for production purposes. Why should we be allowing antibiotics to become ineffective for production purposes, when humans need those medicines to be effective and save human lives. Especially when companies are not making new antibiotics very often.
Given what you know about the hierarchy of chemical organization, answer the following question. If Louisville was a molecule, Jefferson county was a cell, and Kentucky was a tissue, what would United States be in relation to the biosphere?
Organ
________are specialized structures in a cell that performs specific functions.
Organelles
What key factor distinguishes organic compounds from inorganic compounds?
Organic compounds contain carbon
________ is the movement of water across a selectively permeable membrane.
Osmosis
Based on the information in the graph from the national Institute of health, which antibotic was the most effective in treating bacteria from 1981 to 1993?
Penicillin
What information is provided on the Y axis in the following graph?
Percent of susceptible isolate
True
Persons with pacemaker should not be near the microwave when operating.
Plants are self feeding
Plants are considered autotrophs. What does that mean?
______is the outer covering of all cells.
Plasma membrane
________Is a group of individuals belonging to one species usually occupying a defined area
Population
In a chemical equation, the substance on the right-hand side of the equation is called___________
Products
Cells that lack a nucleus are called_______
Prokaryotes
Which of the following traits distinguishes prokaryotes from eukaryotes?
Prokaryotes are usually identical and eukaryotes differentiate
During which phase does the nuclear envelope begin to break down?
Prophase
Enzymes are made of _______
Proteins
Jenna's favorite breakfast food papaya contains significant amount of the Enzyme papain- a protease. Which substances does papain help digest?
Proteins (Proteins= papaya)
an example of a primary consumer would be_______
Rabbit
One way people get Cholera and hepatitis is having ________
Raw sewage in the drinking water
If a researcher makes an experimental observation that is contrary to well-established scientific understanding, what should be the next step?
Re-evaluating the procedure and replicating the experiment
In a chemical equation, the substance is on the left-hand side of the equation are called__________
Reactants
A species will occupy a ________niche in order to reduce competition
Realized
The part of an experiment that is analyzed in order to form a conclusion
Results
Which one of the following proteins is not a complete protein?
Rice
____________ was the first to name cells and included drawings of cork cells.
Robert Hooke
Before Gregor Mendel's experiments with pea plants, many scientists believed that offspring inherited a blend of parental traits. Mendels results inherited a blend of parental traits. Mendels results contradicted this theory. What aspect of the nature and philosophy of science does this change in thinking exemplify?
Scientific knowledge changes as new data becomes available
Latin
Scientific names are based on a two-part naming system using _________words
For centuries, scholars excepted the theory of spontaneous generation. This theory stated that some living organisms arose from nonliving matter, such as the appearance of maggots on dead meat. In 1669, Francisco ready set out to prove that the maggots actually came from the flies rather than from the Duquesne meet. So I just followed up readies experiment with test to support spontaneous generation or to support ready theory that life comes from living organisms. In 1864, Louis Pastuer performed an experiment that proved that spontaneous generation is not a valid theory. Based on this example which of the following statements most accurately describes scientific theories?
Scientific theories are subject to change with new experimental data
Which of the following describes a controlled experiment?
Set up 10 plants with the same seeds, sunlight and water and very the type of fertilizer ***** this one is tricky memorize it exactly
What is the main difference between sexual and asexual reproduction?
Sexual reproduction involves two parents and asexual reproduction involves one.
Which of the following is an example of homeostasis?
Shivering to generate body heat when it is cold outside
False
Since technical writing is instructional and informative, there won't be any chance for plagiarism.
Enzymes have ________which means they will only work with one specific substrate
Specificity
What is the first step of the scientific method?
State the problem
The physical factors in an environment that trigger a response are called______
Stimuli
Proteins begin being digested in the__________
Stomach
The number and type of macroinvertebrates are a good indicator of the amount of pollution In a stream because they tolerate varying levels of pollution. A biology textbook provides this table of tolerance levels. Biology students gather samples from a local stream and conclude that it is extremely polluted. Which table most likely reflects the data gathered by the students?
Stonefly 0 crayfish 2 blackfly 5 leach 5
A __________is a molecule that is acted on by an enzyme
Substrate
Which statement most accurately describes the induced fit model of enzyme function?
Substrate binding SLIGHTLY CHANGED the shape of the enzyme
Which of the following is not a monosaccharide?
Sucrose
All of the following are part of a nucleotide except_________
Sulfate group
Which of the following will not protect you from bacterial infections?
Taking anabiotic's on a regular basis
True
Technical writing follows a specific format that must be adhered to by the author which limits what the author may include?
False
Technical writing really has no sense of style that the author has to follow
False
Technical writing will not need references as the information is completely from the authors thoughts and ideas
Which type of isolation occurs when a species breed at different times of the day or year?
Temporal
According to the following graph, which anabiotic was least effective 1999?
Tetracycline
The valance electrons outside carbon arrange themselves in a_________.
Tetrahedron
Applied science involves research___________
That is necessitated by the problems resulting from some current issue
What is required for both sexual and asexual reproduction?
The DNA must duplicate
What is different about each amino acid?
The R group
False
The United States has officially adopted the S I and is vigorously pursuing the change across the country.
Scanning electron microscope
The _________ provides striking three-dimensional images but never shows a complete image at one time. It provides information about the topography and composition of the object.
Magnification
The ________increases the size of the image of an object
Pepsin is a protein digesting enzyme in the human stomach. Antacids cause the pH of the stomach to increase and the protein digestion becomes less efficient. What occurs to reduce the efficiency of protein digestion?
The active site of pepsin enzyme CHANGES SHAPE
A carbon footprint is the measure of which of the following?
The amount of greenhouse gases emitted each year
Which part of the virus is responsible for triggering an immune response in the body?
The antigens
How does flesh eating streptococcus bacteria cause illness?
The bacteria releases toxins that causes healthy tissue to die
Which of the following is an example of a qualitative observation?
The bird has red feathers
Frank wanted you determine what the best conditions were for mold growth. He research mold growth and found drawings and information about molds. He was going to try to predict under which conditions bread mold would grow best-hot invoice, warm and moist, or cold and moist. He decided that woman noise will provide the best conditions for bread mold growth. He added a slightly damp paper towel to three different plastic bags and then he added a slice of bread each one. Next he sealed the bags. One bag was placed in a warm, dark place like a cabinet near Stowe. Another one was placed in the refrigerator and a third one was placed inside an empty margarine container and covered with the lid that had holes punched in it. This container was placed in a hot place such as under a lamp. He viewed the bags daily and after about two weeks he made notes and drew pictures of the bread samples. He decided to make a wet mount-a slide wet with mold. He placed one drop of the mythalane Blue dye onto the middle of the slide and then use the toothpick to scrape the sample of mold onto the next one. Next to use tweezers in and cover the sample with a coverslip making sure there were no bubbles. After observing each kind of mold, he drew pictures and wrote descriptions. How will Frank decide which mold grew best?
The bread mold that had The most spores under the microscope would tell which conditions were best for bread mold growth.
The fact it is based on a decimal system
The brilliance and simplicity of the SI is __________
High-voltage and electrocution
The dangers of electrophoresis involve
Weight
The following units measure ________pound, dram, ton, ounce
Which of the following is the course of treatment when you have a viral infection?
The immune response in the body will attack the virus
Which of the following did NOT contribute to the increased use of non-renewable energy sources?
The increase in the production of greenhouse gases
Natural selection allows________
The individuals that are best suited to the environment to pass on traits
A metal rod made primarily of platinum
The physical standard for in the SI was _____________until recently when it was changed to equal a number of wavelengths of a wave emitted by krypton.
On Easter Island, what most likely caused the human population to crash between 1600 and 1700 AD?
The population exceeded the caring capacity of the island and they ran out of resources
What characteristic identifies an organic compound
The presence of carbon
Flu viruses are often named based on__________
The protein subgroups on the outside
Why do plants get plant viruses in humans get viruses specific to humans?
The proteins spikes attract specific target cells
Suzy has decided that she wants to see how different salt concentrations affect the cytoplasm of the cell. She does research on plant cells and plant cell components. Suzy decides to use an onion as a source of plant cells because they staying well. A thin layer of the onion is peeled off and placed on a slide. She add one drop of distilled water and one drop of iodine stain and views the cells under a microscope then she drew and identified observe structures. Next she prepared a 5% salt solution - she also prepared a 10% salt solution. She added a few drops of the 5% salt solution to one side of the slide and she look at the slide again under the microscope. She also drew and identify the structures. She repeated the steps with the 10% salt solution. Which slide was the control group?
The slide from the first step with just the stain
Triple point of water
The standard for temperature in SI is based on the ________?
What is the main difference between the structures of DNA and RNA?
The sugar that it is composed of
The original source of energy that consumers obtain in a food chain comes from
The sun
Use the chart showing and your knowledge of enzymes to answer this question. If enzyme B is functioning at 46°C and a pH of 2, under what conditions would the rate of the enzyme action probably speed up?
The temperature increased to 52°C in the pH increase to 3
True
The title of a graph can provide information that may help you answer a question.
What causes a plant to wilt when it needs to be watered?
The vacuole within the plant cells empty, causing the cells to shrivel and wilt
Businesslike
The voice of a technical writing piece tends to be more_________
What happens to blood vessels near the skin when the temperature is COLD?
They constrict to increase blood flow to the CORE OF THE BODY
Which of the following is NOT a characteristic of prokaryotes?
They contain organelles
Why are organic molecules so diverse?
They have carbon skeletons that vary greatly in arrangement
How do national parks contribute to maintaining biodiversity?
They preserve the native species of animals and plants in that area
Variables in an experiment are__________
Things that can affect the outcome
Which statement below best describes the enzyme represented by the graphs that are showing.
This enzyme works best at a temperature of ****27°C and a pH of 6
How do autotroughs obtain chemical energy?
Through photosynthesis
What are complementary proteins?
To incomplete proteins that together provide all the essential amino acids
What is the purpose of performing a controlled experiment?
To provide consistent results that can be repeated
Cell fractionation
To study the parts of a cell, __________is used to breakdown cells and separate the different components for analysis
True
Today a person could pay a company to determine their genome (entire gene sequence of their full complement of DNA) and it would be affordable and can be done in 15 minutes
Which of the following is an example of basic science?
Tracking a population of deer in a specific area
78% of air is nitrogen gas
True
A graph representing exponential growth forms a J shaped curve
True
A healthy human body contains more bacterial cells then body cells.
True
A polypeptide is formed when less than five amino acids joined together with a peptide bond
True
A single amino acid is called a monomer
True
Acid rain is formed when sulfur dioxide combines with droplets of water in the rain, caused mainly by coal and fuel oil being burned.
True
After cytokinesis, the daughter cells return to interphase to begin the cell cycle anew.
True
An ice pack is an example of an endothermic reaction
True
Biodiversity results from the changes that take place in the environment
True
Chemical equations can display information concerning the energies involved in a chemical reaction.
True
Chemical equations symbolically represent chemical reactions
True
Disaccharides contain two monosaccharides bonded together.
True
Environmental protection agency-EPA-has identified more than 30,000 places in the US where toxic waste have been dumped
True
Eukaryotic cells can specialize for certain functions, such as absorbing nutrients from food or transmitting nerve impulses.
True
Evaporation is the process that put water into the atmosphere
True
Fats and oils are made by combining three weak acids with one molecule of glycerol or glycerin.
True
Fats help to maintain your skin and hair, cushion the vital organs, provide insulation, and is necessary for the production and absorption of certain vitamins and hormones.
True
Food changes only organisms that contribute to the diet of the top consumer
True
Functional groups can be added to carbon chains and that will form new compounds.
True
Homeostasis is an ongoing process.
True
Human activities can deliberately or inadvertently alter the dynamics in an ecosystem
True
If a cell is in the G2 phase and it is injected with cyclin, it immediately enters mitosis
True
In April 2012, the FDA establish new guidelines for in a barbecues and agriculture that are to be followed voluntarily.
True
Individuals are considered to be the same species if they have the ability to breed and produce fertile offspring
True
Lipids feel greasy, oily or waxy when crushed.
True
Molecules on the surface of cells normally inhibit the growth of other surrounding cells.
True
Nitrification is the process where ammonia ions are changed into nitrates in her then taking up by plants in the form of amino acids
True
Organelles are specialized structures in cells.
True
Organisms both cooperate and compete in ecosystems
True
Precipitation is the primary connection in the water cycle to provide for the delivery of atmospheric water to the earth
True
Reactions absorb energy have products with stored energy as a result
True
Science can change when new evidence is found
True
Starch is primary utilized by humans as a source of energy or calories
True
The G2 phase is a continuation of growth in preparation for cell division.
True
The body must make proteins to replace the ones it has used.
True
The cell that divides is called the parent cell in the new cells produced are called the daughter cells.
True
The greenhouse effect would exist even without the increased levels of greenhouse gases
True
The oxygen cycle is the cycle were photosynthetic organisms take in carbon dioxide and release oxygen gas into the air
True
The oxygen gas is taken in by animals for respiration which in turn releases carbon dioxide back to the atmosphere
True
The type of sugar used to make a nucleotide is critical in determining the future cellular role of that particular nucleotide
True
Toxic wastes are by products from industrial processes and these not only pollute the land but also the air and water.
True
Permafrost is a layer of frozen soil found in which biome
Tundra
Laws are considered to be_________
Universal
Which of the following describes deductive reasoning?
Uses a general rule and applies it to specific observations
Some heavy metals inhibit enzyme activity in the liver
Using Lupe's data, what is the most accurate conclusion regarding heavy metals inhibition of enzyme activity?
_________acts as storage compartments for things the cell needs.
Vacuoles
Why do antibiotics only kill bacteria and not viruses or healthy human cells?
Viruses in human cells do not have a cell wall
All of the following are examples of biotic factors except
Water
What is the plant die when it runs out of water?
Water is needed for photosynthesis
__________protects leaves from insects and moisture lost.
Waxes
Lydia works in a flower shop after school. She notices that the hydrangeas in container one in pink blossoms, while the hydrangeas and continue to have blue blossoms. She make sure that they all receive the same amount of light in water. Her boss told her that the flowers are all grown from the same seed variety. Lydia discovers, after test in the soil, but I'll bet the same type of soil was used, the soiling container one has a pH of 6.0, and the soil in container to has a pH of 5.0. As described in the scenario above which fundamental assumption of science did Lydia put into practice while working at the flower shop?
We learn how the natural world works by observing it and by conducting experiments
Species, color, method of removal, and disease
What can the forensic team learn from any stray hairs that are found on the victim? Choose all that apply. Forensics
They are all cubed length units.
What do the units of solid volume all have in common, SI and US alike?
Material safety data sheet
What does MSDS stand for?
A word that limits or increases the meaning of the word.
What is a qualifier in a test question?
Sterilization with heat and pressure
What is an autoclave used for?
212
What is the boiling point for water in Fahrenheit degrees?
Study
What is the meaning of the suffix-LOGY?
Scientific experimentation can most likely answer which question regarding the bird population?
What is the relationship between beak size in the number of offspring a bird produces
??????CHECK Take some deep breaths when u start to get frustrated O R Get up extra early perform strenuous exercise
What should you do to get physically prepared to take a test?
10% bleach
What solution should you use to decontaminate glassware that was used in a laboratory setting?
Kastle-Meyer test
What test can be performed on the rug to identify a stain as blood? Forensics
B. Wear patterns C.Manufactures design E. Number of grooves F. Arrangement of tires at the crime scene
What will the forensics team analyze using the tire tracks that were left at the scene? Choose all that apply. Forensics
True
When an astronaut travels to the moon his mass decreases by 1/6.
Cut away from your body
When dissecting, it is important to_____________?
Examination of the wound without any visual aid in describing the area in question
When the medical examiner determine the victim did suffer from a gunshot wound, which of the following best describes the macroscopic examination performed? Forensics
Hospital
Where would you go to find a cardiologist
CM
Which SI unit would be best to measure the width of a pencil? (The measurement would be close to a single digit.)
Kilo, hecto, deca, base unit, Deci, Centi, Milli
Which list below gives all the prefixes of the SI in the order from largest to smallest units?
11
Which number is pointing to the course adjustment?
Seven
Which number is pointing to the light source?
Forensics Serology Unit
Which of the following forensic science units would deal with the collected biological evidence that could potentially contain DNA? Forensics
Cancer
Which of the following illnesses are you suffering from if you have a carcinoma?
A feature article praising the capabilities of a new mobile phone
Which of the following is not an example of technical writing
A weapon
Which of the following is not an example of trace evidence?
Acrylic nails are acceptable
Which of the following is not true when working with a Bunsen burner?
B. Technical terms D. Passive voice F. Correct punctuation G. Facts and information
Which of the following may be found in a technical piece of writing? There may be more than one correct answer.
Facts
Which of the following will be found in technical writing?
A lead to draw the reader
Which of the following will not be found in a technical writing piece?
Handling a uniform shirt from a player with a bloody nose
Which of the following would be transferring a blood-borne pathogen indirectly?
A manual D. Lab report E Proposal to do a project
Which of these are considered pieces of technical writing? there maybe more than one answer possible
Turning on the gas of a Bunsen burner to adjust the gas flow, then striking a match to test it
Which technique is NOT a proper procedure for a classroom lab activity?
Meter
Which unit below is a standard unit?
Hectoliter HL
Which unit below is the largest unit?
Milligram Mg
Which unit below is the smallest in magnitude?
Millimeter MM
Which unit below is the smallest?
KM
Which unit below would be the most suited to measure the distance of a road race?
DL
Which unit is appropriate for measuring the size of a travel sample of lotion?
L
Which unit is appropriate for measuring volume of water in a swimming pool?
Obtain excepted into a college
Why are test necessary in education?
You can get an idea of the meaning of an unfamiliar word
Why is it helpful to be familiar with the meanings of Latin and Greek root words, prefixes, and suffixes?
In an experiment, 6000 people with a common cold to drink orange juice daily had symptoms that lasted an average of four days. Another 6000 people with a common cold who did not drink orange juice daily had symptoms that lasted an average of seven days. Scientist repeated the experiment 3 times with the same results. They concluded that orange juice reduce is the link to the common cold. Was this conclusion valid, and why?
Yes, because scientists repeated the experiment
True
You can sometimes find clues to answers from other questions on the test.
False
You do not necessarily have to report small animal bites to your teacher.
Electrophoresis
_________ is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size in electrical charge.
Cell cultures
________are used to test sell responses under control condition to study interactions between cells into select specific cells for further study
Electrophoresis
________is a process for separating DNA and studying the sequencing and more
what is a polar molecule?
a molecule with a positve end and a negative end
which of the following is an accurate description of a testable question?
a question that can be answered using an experiment
which of the following is an accurate description of a testable question?
a question that can be answered using test or experiments
aquatic species that are capable of making their own light can be found in the ___ zone
abyssal zone
___ solutions contain higher concentrations of H ions
acidic
___ taste sour
acids
when water clings to the edge of a glass, it is considered to be exhibiting which charateristic below?
adhesion
which of the following problems could be solved following the steps of the scientific method?
all of the above
when sodium (Na) and chlorine (Cl) combine, Na gives up one electron to fill Cl's outer level. The result is :
an ionic bond with Na becoming a postivie and Cl becoming a negative ion
ming is having trouble sleeping and decides to participate in a study to determine whether a certain medication helps people sleep. there are 30 volunteers each of whom is assigned to 1 of 2 groups. volunteers in group 1 are given the medication and volunteers in group 2 are given a placebo (pill w no meds). which step is important in order to ensure scientifically valid results?
assigning the subjects to group at random
which system in the biosphere includes the componets that make up the air surrounding the earth?
atmosphere
isotopes are ______
atoms of the same element with different numbers of neutrons
Which experimental design provide scientist with the best data for investigating which type of feed yields the greatest game in lean muscle mass in cattle?
b. Test five similar groups of cows with five different feed mixtures and measure their weight gain at the end of a six-week trial ****very similar answers - remember COWS = B
____ taste bitter and feel slippery on your fingers
bases
baking soda, bathroom cleaners, and ammonia are all examples of ___
bases
what does the prefix -inter mean?
between
___ is a large geographic area that has the same major forms of life and has a particular climate--- such as deserts, forests, and prairies
biome
why are ions so valuable to the body?
both a and b
which of the following should be included when making a general question table ?
both the cause and effect of the change that is being tested
which of the following should be included when making a general question testable?
both the cause and effect of the change that is being tested
how are solutions and suspensions differentiated?
by the size of the particals in the solution
plants get carbon from what chemical in the air?
carbon dioxide
carbon has 6 electrons. which of the following is NOT true about this element?
carbons neutrons are negativly charged
the average, long term weather patterns of a region describes the ___
climate
____ is the holding together of molecules of the same substance
cohesion
the ___ is all the organisms (like plants and animals) that live together in certain defined areas
community
several students in a biology lab tested mealworms preference for damp or dry conditions. the students placed 50 mealworms one by one in the middle of a layer of paper towels with a damp area and a dry area. the mealworms were allowed to move freely over the paper towel for 10 min. after 10 minuites the students noted the location of each mealworm.... which of the following would provide the most accurate results for an experiment?
compare a large sample size from multiple trials
the part of the experiment that is established to dtermine what happens under normal conitions
control
in an experiment, one group that is tested does not experience any change in variables that are being studied. what is that group called
control group
which of the following is an example of a dependent variable?
counting the number of seeds that sprout in 10 different containers that recieved different types of fertilizer
breaking which type of bond would require the most energy?
covalent
bacteria can also return nitrogen to the atmosphere as nitrous oxide or nitric oxide in a reacion called
denitrification
the part of the experiment that is measured to determine the effects of the experiment
dependent variable
which of the following is an example of a testable question?
does increasing the tempature of water cause salt to dissolve at a faster rate?
which of the following is an example of a testable question?
does increasing the tempature of water cause salt to dissolve faster?
___ is the study of the relationships between organisms and their enviorment
ecology
the interactions between a community of living things and its physcial enviroment make up an
ecosystem
what level of organization best describes a group of living organisms and their abiotic enviorment?
ecosystem
the ____ has a negative charge and orbits the nucleus
electron
atoms interact by transfering and sharing the outermost ____
electrons
ions are made by transfering
electrons
_____ form when electrons are shared
electrostatic bonds
a substance that only contains one type of atom is called an
element
green plants storing solar energy is an example of ___
endothermic reaction
when atoms share electrons, it is rarely ___
equal
the ecosystem contains a mixture of salt and fresh water where a river flows into the ocean
estuary
which of the following is NOT one of the 3 ways water returns to the ocean?
evaporation
a bonfire is an example of an
exothermic reaction
a testable question states a general observation of nature
false
all questions in science are testable
false
all questions in science are testable.
false
biotic are the nonliving parts and abiotic are the living parts of an ecosystem
false
covalent bonds are relativley weak bonds and form ions in water
false
during cellular respiration, carbon dioxide CO2 is used by plants to make carbohydrates
false
hydrogen bonds are in the same kind of bonds as ionic bonds
false
hydrogen bonds are much stronger than ionic and covalent bonds
false
most elements nucleui are not stable in their natural state
false
solutions are mixtures that have a gel phase and a sol phase
false
the neutron is the most important part of the atom in forming compounds
false
the shared electrons in water are pulled closer to the carbon atom
false
what are graphical representations of relationships between animals and plants in an ecosystem collectivellty called?
food web
does adding fertilizer have an affect on the growth rate of a plant? what is the dependent variable in this question?
growth rate
a scientist wanted to learn more about population growth in baceteria. the scientist wanted to know "does storing bacterial cultures at a lower tempature affect the growth rate of the bacterial populations?" in this scenario what is the dependent variable?"
growth rate of the population
the stronger the bond the ___ it is to break
harder
a ___ mixture is one in which the substances are evenly distributed throughout the mixture
homogeneous
which of the following questions would basic research be used to answer?
how do dragon flies reproduce?
___ bonds hold many molecules together and ___ bonds hold a molecule together
hydrogen covalent
all of earths water, including both surface (examples--oceans, seas, rivers, lake, and streams) and subsurface water (ground water) are called the
hydrosphere
the periodic table arranges elements on the basis of
increasing atomic number
the part of the experiment that the scientist changes in order to test the effects
independent variable
species must be able to tolerate changes in temp and water levels in the ___ zone
intertidal zone
___ form when electrons are donated and accepted
ionic bonds
when the pH in the stomach increases from 2 to 4, how does the hydrogen ion concentration change?
it decreases by a factor of 1
what is a hypothesis?
it is a statemnt of what the researcher thinks will happen in an experiment
a solution with a pH of 10 is ____ than a solution with a pH of 12
less acidic
compouunds that have hydrogen bonding usually exist as _____ at room temp
liquids
the independent variable is the variable ___
manipulated by the scientist running the experiment
several students in a biology lab tested mealworms preference for damp or dry conditions. the students placed 50 mealworms one by one in the middle of a layer of paper towels with a damp area and a dry area. the mealworms were allowed to move freely over the paper towel for 10 min. after 10 minuites the students noted the location of each mealworm.... which conclusion best supports the data collected in both experiments?
mealworms are more strongly influenced by food than damp or dry coditions
___are composed of 2 or more substances not chemically joined together
mixtures
compounds that have hydrogen bonds tend to have ___melting and boiling points
moderate
why should you preform multiple trials of experiments ?
multiple trials provide more results in order to eliminate inconsistencies due to human error
which oceanic zone contains the highest number of photosynthetic plankton and algae
neritic zone
the ___ has no charge and is found inside the nucleus
neutron
carbon 14 is a radioactive isotope used to determine the age of ancient objects composed of organic matter. carbon 12 and carbon 13 are other isotopes of carbon. the number of what subatomic particals varies among these carbon isotopes?
neutrons
___ is the role (job) of an organism has in a community
niche
True
plural questions should have plural answers.
bc water is an ___ molecule, one end of it is attracted to another end of a different water molecule
polar
___ is a group of individuals belonging to one species usually occupying a defined area
population
which pair below are isotopes?
potassium-19 & potassium-20
in a chemical equation-- the substances that are finishing materials after the reaction on the right hand side of the equation are called
products
the ____ has a positive charge and is found inside the nucleus
proton
each element is different becuase their atoms have different number of
protons
the atomic number is based on the number of ___
protons
the energy given off by an element that has an unstable nucelui is called...
radiation
if a researcher makes an experimental observation that is contrary to well established scientific understanding, what should the next step be?
re-evaluating the procedure and replicating the experiment
in a chemical equation- the substances that are starting materials on the left hand side of the equation are called___
reactants
the part of the experiment that is analyzed in order to form a conclusion.
results
which of the following describes a controlled experiment
set up 10 plants with the same seeds, sunlight and water and vary the types of fertilizer
when you mix sugar and water, the sugar is the ___
solute
___ are mixtures where the solute is dispersed through the solvent so they stay mixed
solution
when u mix sugar and water, the water is the___?
solvent
what is the first step of the scientific method?
state the problem
hydrogen bonds are the ___ of the bonds that hold molecules together
strongest
the hydrogen bonding of water molecules results in water molecules having a higher ____
surface tension
an oil and vinegar salad dressing is an example of a
suspension
___ are mixtures where the solute is too large to stay mixed in the solvent
suspensions
which experimental design would provide scientist with the best data for investing which type of feed yields the greatest gain in lean muscle mass in cattle?
test 5 similar groups of cows with 5 different feed mixtures and measure their weight gain at the end of a 6 week trial
applied science involves research____
that is necessitated by the problems resulting from some current issue
half life is:
the amount of time needed for half of a sample of a radioactive element to decay by giving off radiation
how does a positive ion form?
the atom looses electrons
what is the primary factor that determines the polarity of a bond between atoms?
the difference in the relative attraction of electrons to each atom
does adding fertilizer have an affect on the growth rate of a plant? in this question, what is the independent variable?
the fertilizer
which should be included in a testable question?
the indepentent and dependent variables
the stability of an atoms nucleus depends on which of the following?
the neuton to proton ration in the nucleus
a scientist wanted to learn more about population growth in baceteria. the scientist wanted to know "does storing bacterial cultures at a lower tempature affect the growth rate of the bacterial populations?" in this scenario what is the independent variable?"
the tempature
variables in an experiment are...
things that can affect the outcome
what is the purpose of performing a controlled experiment?
to provide consistent results that can be repeated
78% of air is nitrogen gas
true
a charged atom is called an ion
true
a polar compound with one side having a negative charge and the other side a positive charge.
true
a pure sample of heluim gas will contain all the isotopes of helium in the sample
true
all living organisms have a pH window in which they can live
true
all matter is made up of atoms
true
an unstable nucleus will give off radiation in an effort to become stable
true
chemical equations can display information concerning the energies involved in a chemical reaction
true
chemical equations symbollicllay represent chemical reactions
true
human activites can deliberately or inadvertly alter the dynamics in ecosystems
true
hydrogen bonding not only occurs in complex biological molecules, but it also occurs in water and ammonia molecules
true
ionic compounds form ions in water
true
it is important to run an experiment many, many times to get valid results
true
it takes a large amount of energy to seperate the hydrogen bonds that hold water molecules together
true
most aquatic plants live in a pH window from 4.5 to 7.0
true
negative ions have more electrons than protons
true
nitrification is the process where ammonia ions are changed into nitrates and are then taken up by plants to form amino acids
true
nuclei which are unstable tend to give off energy to become stable nuceli; this energy given off is called radiation
true
organisms both cooperate and compete in ecosystems
true
positively charged ions are attracted to negativly charged ions , and negatively charged ions are attracted to positively charged ions
true
precipitation is the primary connection in the water cycle that provides for the delivery of the atmosphere water to the earth
true
the atomic mass number of an element is the sum of the protons and neutrons located in the nucleus of the atom
true
the oxygen cycle is the cycle where photosynthetic organisms take in carbon dioxide and release oxygen gas into the atmosphere
true
the oxygen gas is taken in by animals for respiration which in turn releases carbon dioxide back into the atmosphere
true
water expands when it freezes
true
water is a polar molecule
true
water is an example of a polar compound
true
water is found in nature in a liquid state, solid state and a gas state
true
permafrost is a layer of frozen soil found in which biome
tundra
dr. hansen performs an experiment testing the effectivness of different cough syrups. identify the indepentent variable in the experiment
type of cough syrup
which of the following is an example of an independent variable ?
using different brands of fertilizers on 10 different containers of plants
___ are things that can affect the outcome of an experiment
variables
___ is the universal solvent
water
all of the following are examples of biotic factors excpet
water
why do plants grow is a general question? which of the following demonstrates a testable question for plant growth??
will adding fertilizer to a plant increase the plant height after 3 weeks?
why do plants grow? is a general question. Which of the following demonstrates a testable question for plant growth?
will adding fertilizer to a plant increase the plant height after 3 weeks?
