9th biology 1.2 quiz review

In 1908, there was an explosion in Siberia equivalent to the detonation of 15 million tons of TNT. Many hypotheses have been proposed for what caused the explosion. It is theorized that the explosion was caused by a natural phenomenon and was not caused by man. Which of the following statements is true? This theory is a fact. This theory could possibly be proven false. This theory will never be refuted. This theory is an example of a scientific law.

This theory could possibly be proven false.

Which of the following could be a hypothesis for a comparative investigation? (remember comparative means comparing 2 things!) --Decreasing nitrogen content in the air leads to darker leaves in plants. --The water content of oak tree leaves is different than that of palm tree leaves. --The water content of leaves is related to their surface area.

--The water content of oak tree leaves is different than that of palm tree leaves.

Put the following steps in order to describe an experiment that follows the scientific method. Make sure to use all steps provided, even if not every experiment may use them. --test revised hypothesis --make initial observation --test initial hypothesis --testing discredits the initial hypothesis --the revised hypothesis becomes a theory --form initial hypothesis --testing confirms the revised hypothesis --revise hypothesis

Hint: 'initial' statements are first. --make initial observation --form initial hypothesis --test initial hypothesis --testing discredits initial hypothesis --form revised hypothesis --test revised hypothesis --testing confirms revised hypothesis --the revised hypothesis becomes a theory

Albert is preparing to conduct an experiment to determine whether adding salt to a pot of water will cause a change in the boiling point of the water. What instrument should he use during his investigation? --Celsius thermometer --triple beam balance --light detector --barometric probe

Celsius thermometer

Which is based on natural and physical phenomena and states why a certain event occurs the way it does? --experiment --theory --observation --law

theory

Calculate 3 raised to the 6th power. Calculate the cubed root of 729

729 (3 raised to the 6th power) 9 is the cube root of 729 (9x9x9)

Which statement is true about a scientific hypothesis? A hypothesis is a possible explanation of an observed set of facts. A hypothesis is the same thing as a theory. A hypothesis is also referred to as an uneducated guess. A hypothesis is the first step in the scientific method.

A hypothesis is a possible explanation of an observed set of facts.

Victor is studying the effects of a plant supplement on the growth (height) of a variety of pea plants. For the first group of plants, Victor will not add any plant supplement to the soil. For the second group of plants, Victor will add 5 g of plant supplement. For the third group of plants, Victor will add 15 g of plant supplement. All groups will be grown in the same conditions and given 375 mL of water each day for 14 days. What tools should Victor use in this investigation? Select all the tools that apply. (Not all tools needed for the investigation are listed below.) --micropipette --electronic balance --meter stick --stopwatch --lab journal

--electronic balance --meter stick --lab journal

If a hypothesis withstands testing over a wide variety of conditions for many years, then the hypothesis will most likely be what? --no longer tested --incorporated into a theory --made invalid --proven correct

--incorporated into a theory

Calculate 3 raised to the 5th power. Calculate the cubed root of 512.

243 (3 raised to the 5th power) 8 is the cube root of 512 (8x8x8)

Which of the following statements about hypotheses is false? A hypothesis is an educated guess as to why something happens. A hypothesis is an explanation for a natural phenomenon. A hypothesis must be testable in a way that is replicable by others. A hypothesis should be created when the outcome for its test is known.

A hypothesis should be created when the outcome for its test is known.

Rico is planning an investigative procedure. Which of the actions should he perform before beginning his experiment? --formulate a testable hypothesis --write his conclusion --record the data he collected --ask questions about the subject he is studying --ensure there are enough of the consumable materials that he will use --select the equipment he will need

There are 4 correct answers --formulate a testable hypothesis --ask questions about the subject he is studying --ensure there are enough of the consumable materials that he will use --select the equipment he will need

Does science have any limitations? --No, anyone can test anything. --No, but only some scientists can test certain topics in a way that makes them fall into the realm of science. --Yes, there are certain things science can never test. --Yes, but with technological improvements all things will be testable one day.

Yes, there are certain things science can never test.

During a lab to find energy transformations, Tisha and Dee will run down the hallway, converting the chemical energy in food they ate into potential and kinetic energy. Which instrument of lab equipment should they use to measure the length of the hallway? --a triple beam balance --a thermometer --a stopwatch --a meter stick

a meter stick

A significant number of scientific hypotheses over time have all had similar results leading to the same conclusion. With continued testing and validated conclusions, these scientific hypotheses could become a what? --a scientific theory --scientific hunch --a control group --a scientific method

a scientific theory

Identify the appropriate tool or piece of technology for each job. --graph paper, graphing calculator, or computer --graphing calculator or computer --computer a)Which would you use to create a color-coded graph that can be printed in a lab report? b) which would you use to determine the best fit line and the precise formula for that line? c) Which would you use to plot a few points to determine the general shape of the curve?

a) graph paper, graphing calculator, or computer b) graphing calculator or computer c) computer

The scienfic process can be summarized into these stages: organize, analyze, evaluate, make inferences, and predict trends. Conducting experiments falls under which stage? --evaluate --analyze --make inferences --predict trends

analyze

The experimental process involves four stages: analyze, evaluate, make inferences, and predict trends. Place each activity under the stage in the experimental process it best represents. All activities will be used. Analyze---Evaluate---Make inferences---Predict trends summarize data propose potential interrelationships form new hypothesis collect raw data recommend follow up experiments suggest related phenomena determine treatment differences conduct experiments

analyze: conduct experiments & collect raw data evaluate: summarize data & determine treatment differences make inferences: suggest related phenomena & propose potential interrelationships predict trends: form a new hypothesis & recommend follow up experiments

Scientists hypothesize about cold fusion, and scientists theorize about hot fusion. Which one is more likely to exist? hot fusion, because scientific theories are highly-reliable explanations cold fusion, because scientific theories are highly-reliable explanations hot fusion, because hypotheses are highly-reliable explanations cold fusion, because hypotheses are highly-reliable explanations

hot fusion, because scientific theories are highly-reliable explanations

Which is the use of evidence to construct testable explanations and predictions of natural phenomena, as well as the knowledge generated through this process. --science --statistics --sorcery --scholarship

science

Which statement is false? --A theory can be disproven. --Some define a theory as a well-tested and accepted hypothesis. --A theory is a guess about how things work. --A theory can incorporate laws.

--A theory is a guess about how things work.

Which of the following ways are computers used to conduct scientific work? --Computers store data from repetitive measurements. --Computers plot graphs and charts. --Computers design new experiments based on past results. --Computers are used to communicate results to colleagues and the public. --Computers sort large amounts of data. --Computers interpret data to create an understanding of a system.

--Computers store data from repetitive measurements. --Computers plot graphs and charts. --Computers are used to communicate results to colleagues and the public. --Computers sort large amounts of data.

Which statement DOES NOT describe a scientific theory? --In the future, as new areas of science are developed, new technology is created, new data are interpreted, and new evidence is found, it may be revised. --It is used to explain an observation or a sequence of observations. --It is supported by an abundance of evidence allowing its use as groundwork for future research. --It may be used as an inquiry for research, standing as a tentative explanation.

--It may be used as an inquiry for research, standing as a tentative explanation.

Jean studies the behavior of bats. She compared the wing usage of 100 fruit bats to determine if they, as a group, used their left wing or the right wing the most when reaching for a banana. Determine how Jean would need to plan and implement her comparative investigation by ranking the order in which each step should occur in a scientific investigation. Place the first step at the top, and the last step at the bottom, of the box. --Jean observed and recorded each bat's wing reach 3 times. --Jean read background information on similar studies. --Jean stated that fruit bats use their right wings more often than their left wings. --Jean developed her scientific hypothesis. --Jean analyzed her data.

--Jean read background information on similar studies. --Jean developed her scientific hypothesis. --Jean observed and recorded each bat's wing reach 3 times. --Jean analyzed her data. --Jean stated that fruit bats use their right wings more often than their left wings.

Isabella has completed her science fair project titled: "Which is more effective at removing grass stains from fabric: chlorine bleach, non-chlorine bleach, or hydrogen peroxide?" Put Isabella's statements and questions in a logical order. --I believe chlorine bleach will be most effective. --Chlorine bleach removed 50% of the stains. --Hydrogen peroxide was the most effective. --Which is more effective at removing grass stains from fabrics?

--Which is more effective at removing grass stains from fabrics? --I believe chlorine bleach will be most effective. --Chlorine bleach removed 50% of the stains. --Hydrogen peroxide was the most effective.

Which describes theories? --testable only by the researcher who made the hypothesis --capable of being tested by multiple independent researchers --untestable

--capable of being tested by multiple independent researchers

Suppose you are going to investigate the length of time needed to hard boil an egg. Which of the following things will you need? Select all that apply. --eggs --testable hypothesis --balance --stove or heat source --pot half full of water --ice bath --timer --way to organize or mark the eggs

--eggs --testable hypothesis --stove or heat source --pot half full of water --timer --way to organize or mark the eggs

Victor is studying the effects of a plant supplement on the growth(height) of a variety of pea plants. For the group of plants, Victor will not add any plant supplement to the soil. For the second group of plants, Victor will add 5 g of plant supplement. For the third group of plants, Victor will add 15 g of plant supplement. All groups will be grown in the same conditions and given 375 mL of water each day for 14 days. What tools should Victor use in this investigation. Select all that apply. --micropipette --electronic balance --meter stick --stopwatch --lab journal

--electronic balance --meter stick --lab journal

James is investigating the relationship between density and buoyancy. To implement his investigation, he starts by making observations about whether certain objects sink or float in water. Later, he intends to conduct a scientific experiment. What should James do after making his observations but before conducting the experiment? --nothing --formulate a testable hypothesis --formulate a conclusion --analyze the data

--formulate a testable hypothesis

Place the steps of the scientific process in order from the first step in the process to the last step. --compare results from other unbiased experiments --form theory --analyze results --form hypothesis --make observations --revise theory as new areas of science are developed --conduct experiments

--make observations --form hypothesis --conduct experiments --analyze results --compare results from other unbiased experiments --form theory --revise theory as new areas of science are developed

A significant number of scientific hypotheses over time have all had similar results leading to the same conclusion. With continued testing and validated conclusions, these scientific hypotheses could become what? --scientific theory --scientific hunch --control group --scientific method

--scientific theory

Wayne plans to investigate the relationship between solubility and temperature. Which would be a useful step as he plans his procedure? --start experimenting without a plan --select appropriate technology, such as a graphing calculator to plot data --formulate a conclusion --analyze data

--select appropriate technology, such as a graphing calculator to plot data

Juan is preparing to conduct an experiment measuring how the freezing point of a liquid is changed by the addition of several different salts. In order to measure the freezing point depression of the liquid, what instrument is most important? --°C temperature probe --pH probe --light detector --barometric probe

--°C temperature probe

In biology class, Angela's teacher wants students to plan and implement an EXPERIMENTAL investigation regarding specialized plant organs. Angela was assigned fern roots. Follow the directions for each of the areas below that cover aspects of investigation procedures. 1)Select, from the list below, the best possible question Angela could set out to answer in this experimental investigation. --How will watering the fern plants in varying amounts affect the lengths of the roots? --How will exposing the ferns to different types of light affect the heights of the plants? --Where are fern cells most densely packed: the roots or the leaves? --How will watering the ferns in varying amounts affect the broadness of the leaves? 2)Select, from below, the single best testable hypothesis Angela could use in this experimental investigation. --The plants that are watered 50 mL per day will have longer roots than the plants that are watered 50 mL every other day. --The plants exposed to natural light outside will grow taller than the plants exposed to natural light inside the classroom. --The fern cells will be more densely packed in the roots than in the leaves. --The plants that are watered 50 mL per day will have broader leaves than the plants watered 50 mL every other day. 3)Select, from the list below, all appropriate equipment that Angela should select for this experimental investigation. --graduated cylinder and water --slide mounted with a cross-section of a fern root --microscope --pencil and paper --ruler 4)Select, from the list below, all appropriate technology that Angela should select for this experimental investigation. --computer --USB cable for microscope and computer --microscope

1) --How will watering the fern plants in varying amounts affect the lengths of the roots? 2) --The plants that are watered 50 mL per day will have longer roots than the plants that are watered 50 mL every other day. 3) --graduated cylinder and water --pencil and paper --ruler 4)--computer

In biology class, Carmen's teacher wants students to plan and implement a DESCRIPTIVE investigation regarding specialized plant organs. Carmen is assigned fern roots. Follow the directions for each of the areas below that cover aspects of investigation procedures. If you have your teacher's permission, implement this investigation when all questions are correct. 1)Using the list below, select possible questions Carmen could set out to answer in this descriptive investigation. (more than 1 answer) --How do root cells compare to leaf cells? --If root cells are exposed to water, will they expand? --What cell organization patterns are present in fern root cells? --What features do cells along the edge of the fern root have? 2)From the list below, select all appropriate equipment that Carmen should select for this descriptive investigation. --slide mounted with cross-section of a fern root --pencil and paper --pipettes filled with water --Bunsen burner --microscope --slide mounted with cross-section of a fern leaf 3)Select, from the list below, all appropriate technology that Carmen should select for this descriptive investigation. --graphing calculator --computer --USB cable for microscope and computer

1) --What cell organization patterns are present in fern root cells? --What features do cells along the edge of the fern root have? 2) --slide mounted with cross-section of a fern root --pencil and paper --microscope 3) --computer --USB cable for microscope and computer

In biology class, Jackie's teacher wants students to plan and implement a COMPARATIVE investigation regarding specialized plant organs. Jackie is assigned fern roots and leaves. Follow the directions for each of the areas below that cover aspects of investigation procedures. 1)Select the best single question Jackie could set out to answer in this comparative investigation. --If ferns are exposed to light, will the leaves grow toward the light? --What features do cells along the edge of a fern stem have? --Where are fern cells most densely packed: the roots or the leaves? --If ferns are watered in varying amounts, how will this affect the root length? 2)Select, from the list below, all appropriate equipment that Jackie should select for this comparative investigation. --pipettes filled with water --microscope --pencil and paper --slide mounted with a cross-section of a fern leaf --flashlight --slide mounted with a cross-section of a fern root 3)Select, from the list below, all appropriate technology that Jackie should select for this comparative investigation. --USB cable for microscope and computer --graphing calculator --computer

1) --Where are fern cells most densely packed: the roots or the leaves? 2) --microscope --pencil and paper --slide mounted with a cross-section of a fern leaf --slide mounted with a cross-section of a fern root 3)--USB cable for microscope and computer --computer

Lucy is an astrochemist who believes she has discovered a brand new element in a rock collected by the Mars Rover, which she has already named Lucerium. Her manager reminds her to study the sample before jumping to such a dramatic conclusion. As Lucy prepares to identify whether or not the element is indeed new, what questions are most important to ask? Select all that apply. a)What is the atomic weight of this sample? b)Is the sample one atom, or does it comprise different types of atoms? c)How much does the sample weigh? d)Does the sample react with oxygen?

3 are correct: a)What is the atomic weight of this sample? b)Is the sample one atom, or does it comprise different types of atoms? d)Does the sample react with oxygen?

Which statement about scientific theories is false? --A theory has been extensively tested and is generally accepted by the scientific community. --A theory specifically predicts future events for particular circumstances. --A theory explains some aspect of the natural world. --A theory can incorporate other facts, laws, and predictions that are independently accepted by the scientific community.

A theory specifically predicts future events for particular circumstances.

Which statement is evidence to support a hypothesis? --it is logical --lots of people agree with it --data --all of the above

data

Match each scientific term from the word bank with the correct definition. All of the terms will be used once. fact--law--hypothesis--theory--observation--inference--principle a)a proposed explanation of an observation based on scientific knowledge that must be testable and falsifiable b)a logical conclusion based on observations and existing knowledge c)a statement of repeated observations, not including an explanation of those observations d)an explanation for a set of observations or natural phenomena based on repeated testing e)a widely accepted theory or law f)an observation that has been repeatedly confirmed and accepted as true g)information obtained from the use of one or more of the five senses, the first step in scientific inquiry

a) hypothesis b) inference c) law d) theory e) principle f) fact g) observation

Karen wants to observe the spectrum of some common light sources such as her desk lamp and the flourescent classroom lights. Which tool should she use to observe the wavelengths of these light sources? --hand-held spectroscope --convex lens --prism --protractor

hand-held spectroscope