Development of Scientific Knowledge Answers

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Why do scientists try to repeat other scientists’ experiments?

A
to test if the instruments in their labs are working properly
B
to practice following the procedures
C
to try to improve the first scientist’s work
D
to see if the original results are reproducible
2
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Which statement best explains the relationship between science and technology?

A
Advances in technology lead to advances in science, which lead to advances in technology.
B
New technology must be developed before new scientific discoveries can be made.
C
New discoveries in science must be made before new technologies can be developed.
D
New developments in technology are not followed by a period of scientific discovery.
3

Which career field is an applied science?

A
geology
B
biotechnology
C
physics
D
chemistry
4

Which statement about technology is true?

A
Technology improves a scientist’s ability to make observations.
B
Technology does not have any effect on a scientist’s work.
C
Technology is necessary for scientists to perform experiments.
D
Technology only helps scientists analyze data and write reports.
5

A scientist noticed that a dark-colored peppered moth is more visible on a light-colored background than a light-colored peppered moth. He wonders, “Does this difference in visibility affect the survival rate of dark moths?” Which part of the scientific method does he need to carry out next?

A
Pose a question.
B
Form a hypothesis.
C
Interpret data.
D
Form a conclusion.
6

What is one way that early scientific practice differed from modern scientific practice?

A
Early hypotheses were not based on observations.
B
Early hypotheses were not tested by experimentation.
C
Early hypotheses were formed from scientific questions.
D
Early hypotheses were influenced by creative thinking.
7

In 1970, Hamilton Smith isolated the first restriction enzyme. Restriction enzymes are used to cut strands of DNA at specific points. This discovery led to the development of recombinant DNA, which is widely used in several scientific industries to produce proteins and hormones more cheaply and in much larger quantities than earlier methods. The change in scientific knowledge caused by Smith’s discovery most directly affected which sector of society?

A
technology
B
commerce
C
government
D
education
8

A scientist who conducted an experiment obtained an unexpected result. What will she most likely do with the unexpected result?

A
leave it out of her analysis and final report
B
stop the experiment and begin again
C
change the procedures and try again
D
develop a new question to be investigated
9

Why is the scientific method described as nonlinear?

A
The steps of the scientific method are repeated in a cycle.
B
Scientists often repeat one or more steps several times.
C
Sometimes scientists forget to perform some of the steps.
D
The steps can be performed only once but in any order.
10

A student conducted an experiment with two rose plants to determine if a liquid formula for fertilizer produced greater growth than a dry formula. After testing each fertilizer on two different plants for one month, his data led to the conclusion that the liquid formula was a better promoter of plant growth. When he described his conclusion to his teacher, she told him he needed to conduct additional trials. The teacher most likely asked for additional trials because

A
she did not believe the new formula helped plants grow better than the old formula.
B
it was necessary to see data from more plants before the conclusion could be accepted.
C
it was necessary to have tested the fertilizer on different kinds of plants.
D
she thought he should test additional fertilizer formulas on the same two plants.

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