Chapter 1

1.

1 point

A limitation of models is that

they are smaller than the things that they model.

they do not act exactly like the things that they model.

they model unfamiliar things.

they are large enough to see.

2.

1 point

Which of the following is an assistive bioengineered product?

a pair of crutches

a graft of artificial skin

a vaccination

a hip replacement

3.

1 point

What is science?

the knowledge obtained by observing unnatural events and conditions in order to formulate principles that can be verified

the knowledge obtained by observing natural events and conditions in order to write laws that need no verification

the knowledge obtained by observing natural events and conditions in order to formulate principles that cannot be verified

the knowledge obtained by observing natural events and conditions in order to discover facts and formulate principles that can be verified

4.

1 point

What is one way scientific knowledge can change?

when a hypothesis is not supported by tests

when results confirm what is already known

when a scientist makes a new hypothesis

when a hypothesis can not be tested

5.

1 point

What are some methods of communicating the results of investigations?

Call the news media, hand out flyers.

Advertise the results in a science magazine.

Write a scientific paper, make a presentation, create a Web site.

Only reveal results to close friends and family.

6.

1 point

Why does the process of building scientific knowledge never end?

Because when new evidence challenges accepted ideas, scientists automatically replace the old ideas.

Because when new evidence challenges accepted ideas, scientists reevaluate the old ideas.

Because when new evidence challenges accepted ideas, scientists usually reject the old ideas.

Because old ideas become less meaningful over time.

7.

1 point

Experiments that test only one factor at a time, and which consist of a control group and one or more experimental groups are

controlled experiments.

hypotheses.

scientific methods.

variables.

8.

1 point

Which of the following shows the correct order of the engineering design process?

identifying and researching a need; developing possible solutions; making a prototype; testing and evaluation; modifying and retesting the solution

identifying and researching a need; modifying and retesting the solution; making a prototype; developing possible solutions; testing and evaluation

testing and evaluation; modifying and retesting the solution; identifying and researching a need; developing possible solutions; making a prototype

9.

1 point

The steps of scientific methods

must be used in the same order every time.

are not used in the same order every time.

are exactly the same in every investigation.

always end with a conclusion.

10.

1 point

An example of assistive bioengineering is

a prosthetic limb.

laser eye surgery.

the microchip.

the contact lens.

11.

1 point

What is true of a good hypothesis?

It is based on observation and can never be tested.

It is easily verifiable and can be tested.

It is based on observation and can be tested.

It is based on intuition and can never be tested.

12.

1 point

What differs between the control group and experimental groups in a controlled experiment?

a hypothesis

everything

nothing

a variable

13.

1 point

Why do scientists use scientific methods?

to investigate problems in an ordered way

because scientists were taught to use scientific methods

14.

1 point

The process of creating technology is

an intended benefit.

cost-benefit analysis.

bioengineering.

engineering.

15.

1 point

Which of the following are methods of investigation?

search, observance, mineralization

confrontation, adulation, liquefaction

physical, mathematical, conceptual

research, observation, experimentation

16.

1 point

Which of the following safety symbols are listed in your text?

eye protection, ear protection, hair protection

electric safety, chemical safety, plant safety

electric safety, chemical safety, mineral safety

hand safety, ear protection, nose protection

17.

1 point

What is one benefit of scientific models?

Models tend to be exactly like the original.

Models can take the place of scientific law.

Models can represent something that does not exist.

Models can replace any further investigation.

18.

1 point

A zoologist might study any of the following EXCEPT

rocks and minerals in the Painted Desert.

shellfish living in ponds.

the reason that mole rats live in large groups underground.

environmental threats to sea turtles.

19.

1 point

What is adaptive bioengineering?

the development of products that help but don’t change living things

the development of products that change living things

the development of products that change non-living things

20.

1 point

Which of the following is a good way to analyze data?

Put it away for a few months to see if it makes more sense later.

Organize it into charts and graphs, do calculations if necessary.

Try to find some way to make it support your hypothesis.

Check it over and then copy it.

21.

1 point

What is the difference between area and volume?

Volume measures surface, and area measures the size of a body in three-dimensional space.

Area measures surface, and volume measures the size of a body in three-dimensional space.

Volume is dependent on mass and area is not.

Area is dependent on mass and volume is not.

22.

1 point

Which of the following are benefits of models?

They can represent things that are impossible to represent.

They are better than the real thing in some cases.

They can represent things that are small, large, complicated, or that don’t exist.

They never fail to represent reality.

23.

1 point

What is true of a scientific law?

It is a summary of many experimental results and observations, but it does not tell how things work.

It is a summary of many experimental results and observations, and it explains why things work.

It is a summary of many experimental results and observations, and it tells how things work.

It is the end result of one experiment, and it explains how things work.

24.

1 point

What does volume measure?

the amount of matter in a given area

the size of a body or a region in three-dimensional space

the amount of matter in an object

the size of a surface or a region

25.

1 point

In a controlled experiment,

all factors should be different.

a variable is not needed.

a control group is compared with one or more experimental groups.

there are at least two variables.

26.

1 point

How does recycling benefit society?

It makes everyone’s life easier.

It makes the country safer.

It saves resources.

It saves businesses money.

27.

1 point

The one factor that differs between a control group and the experimental group in a controlled experiment is the

controlled experiment.

scientific method.

variable.

hypothesis.

28.

1 point

What is true of a scientific theory?

It explains how, but not why.

It is an explanation that ties together many hypotheses and observations.

It is an explanation that does not use hypotheses and observations.

It is an explanation based on a single hypothesis.

29.

1 point

Which of these is a benefit of science?

recycling systems to save resources

increased air and water pollution

declining world population

the end of the twentieth century

30.

1 point

Possible explanations or answers to questions are

scientific methods.

hypotheses.

controlled experiments.

variables.

31.

1 point

Which is true of scientific models?

Models are not useful or perfect.

Models are useful and usually perfect.

Models are perfect, but not useful.

Models are useful, but not perfect.

32.

1 point

Agricultural engineers fulfill a social need by

creating unintended consequences.

communicating their results with other scientists.

developing unintended prototypes.

developing irrigation systems for farmers.

33.

1 point

Which of these is a benefit of science to society?

Scientists are searching for ways to conserve their time.

Colleges are trying to produce more scientists.

Scientists are searching for cures for diseases.

Scientists are trying to earn more money.

34.

1 point

Why do scientists analyze results of experiments?

because that is the point of being a scientist

because scientists need to prove they were right

because it helps scientists focus on the effect of the variable

because scientists need to make the results prove the hypothesis