Nature of Science Review

Using one or more of your senses to gather information is called

• Inferring

• Observing

• Predicting

• Hypothesizing

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An educated guess or testable prediction is a

• theory

• law

• hypothesis

• conclusion

The amount of space occupied by an object is its ________________.

• length

• volume

• mass

Observations that deal with a number or amount are called

• qualitative

• quantitative

The Skittles are yellow, red and green is an example of _____.

• qualitative observations

• quantitative observations

• hypothesis

The part of an experiment that doesn't change is a _____.

• control

• constant

• conclusion

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The steps commonly used by scientists in gathering information to test hypotheses and solve problems are called _____.

• scientific inquiry

• hypothesis

• scientific method

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The variable that is changed by the scientist to test a hypothesis is called the _________________________ .

• dependent variable

• independent variable

• control

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Scientists frequently repeat the experiments of others scientists. Why is this important in science?

• Scientists often ask each other for help in performing experiments.

• Replication of experiments helps to confirm and verify results.

• Scientists frequently perform other scientists’ experiments in order to practice their technique.

• Repeating experiments is an effective way to make sure a laboratory is in optimal condition.

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Cara read an article on why repetition and replication are so important, but she did not understand the difference between them. Which of the following best explains the two terms?

• Repetition is when a scientist repeats an experiment; replication is when a scientist conducts an experiment on genetic material.

• Repetition is when a scientist does the same experiment a number of times; replication is when other scientists reproduce a scientist’s experiment.

• Repetition is when a scientist publishes in more than one scientific periodical; replication is when another scientist reproduces another scientist’s results.

• Repetition is when a scientist commits an error in an experiment the first time and must repeat it; replication is when a scientist repeats an experiment to make sure it is valid.