AnswersFL-2003010-MJ Physical ScienceExperimental Design Principles

Experimental Design Principles Answers

10 verified answers
1
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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.
2
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When 560,000 is written in scientific notation, what is the power of 10?

A
4
B
5
C
6
D
7
3

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.
4

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.
5

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
6

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.
7

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
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 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
10

Why is scientific notation used?

A
to round numbers to the nearest whole number
B
to promote reproducibility of data
C
to increase the validity of data
D
to express very large or very small numbers
11

Renald completed only one trial of his experiment. What effect will this most likely have?

A
The results are more likely to have errors.
B
The results are more likely to be precise.
C
The experiment will be harder to replicate.
D
The experiment will be easier to replicate.
12

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.
13

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.
14

Maya tried to hit four golf balls into a hole marked with a flag. The diagram shows where the golf balls landed.

Question illustration
A
high precision, low accuracy
B
low precision, high accuracy
C
high precision, high accuracy
D
low precision, low accuracy
15

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
16

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.
17

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
18

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

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