Unit 1 Physical Science Test Review

The practical use of science to improve human life is called (a)   .

• physics

• biology

• technology

• chemistry

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Which of the following is an example of a quantitative observation?

• The flowers are red.

• The liquid is cold.

• The table is rough.

• The mass of the rock is 250 g.

Why do scientists say that “every experiment provides useful information”?

• Even unexpected results give insight.

• Failed experiments cannot be repeated.

• It always proves the hypothesis.

• It prevents human error.

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NGSS.MS-PS1-2

A scientist wants to study the effect of diet on puppies’ weight. Which group could serve as the control group?

• Puppies that receive the regular diet

• Puppies that receive vitamin supplements

• Puppies that receive extra protein

• Puppies that receive double food portions

Critical thinking in science mainly involves…

• memorizing facts quickly

• accepting all results as correct

• analyzing data before drawing conclusions

• repeating experiments without questioning them

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A (a)   is a rule that describes a pattern observed in nature, tested repeatedly.

• theory
• law
• model

A variable in an experiment that is controlled and the same for all

• constant

• hypothesis

• factor

• variable

Scientists test predictions by…

• reading a textbook

• conducting experiments

• asking opinions

• writing theories

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A scientific model is best described as…

• a) a copy of an experiment

• b) an explanation or representation of something complex

• c) an opinion of a scientist

• d) a guess about results

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Which of the following is an outcome of applying science to society?

• more traditions

• new technologies

• fewer discoveries

• less communication

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