AnswersMadison 2017 Phy Sci A-35 SSSafety in Science

Experimental Design Principles Answers

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1
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What does it mean if an experiment exhibits reproducibility?

A
The experimental conditions are simple and do not require a lot of materials.
B
The experimental conditions are always kept the same.
C
The results of the experiment are always accurate.
D
The same results are expected each time the experiment is done.
2
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Which describes reproducibility?

A
The ability of data to be published.
B
The ability of data to be duplicated.
C
The ability of data to be changed.
D
The ability of data to be invalidated.
3

What is 18,000 expressed in scientific notation?

A
1.8 × 10–4
B
1.8 × 104
C
1.8 × 10–5
D
1.8 × 105
4

Which describes the best approach when conducting a scientific experiment?

A
conduct repeated trials and make sure the experiment can be replicated
B
conduct a single trial and make sure the experiment can be replicated
C
conduct repeated trials and make sure the experiment cannot be replicated
D
conduct a single trial and make sure the experiment cannot be replicated
5

What does it mean if data are reproducible but not accurate?

A
The data can be produced over and over but are not close to the accepted value.
B
The data are close to the accepted value but cannot be produced over and over.
C
The data are close to the accepted value and are close to one another.
D
The data are close to the accepted value but are not close to one another.
6

A scientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. Another scientist conducted the same experiment and got similar results.

A
repetition
B
replication
C
precision
D
validity
7

Which describes the correct procedure when converting a number from scientific notation to standard notation if the power of 10 is -10?

A
Move the decimal point to the left.
B
Move the decimal point to the right.
C
Add 20 to the number.
D
Subtract 20 from the number.
8

What are two main purposes for using repetition when conducting experiments?

A
recording data easily and saving time
B
increasing confidence in results and recording data easily
C
reducing mistakes and increasing confidence in results
D
saving time and increasing confidence
9

A scientist conducted one trial of an experiment and got unexpected results. How can the scientist increase confidence in the results?

A
by repeating the experiment several times
B
by changing the experimental procedure
C
by asking other scientists what they think about the results
D
by modifying the results so they are close to the expected results
10

Which best explains why replicating an experiment should be done by someone other than the person who originally did the experiment?

A
It shows that the results are the same using different methods.
B
It shows that the experiment is easy to do.
C
It shows that the results are as expected.
D
It shows that the experiment is designed properly.

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