AnswersFL-2003010-MJ Physical ScienceUnit Test

Unit Test — Unit test Answers

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Which kind of investigations allow for the control of variables?

A
hypothesis
B
experimental
C
descriptive
D
comparative
22
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Helium is naturally occurring, lighter-than-air gas that is used commercially to fill balloons.Which statement best describes how science was impacted by society in regards to helium?

A
Helium has been mass produced to meet consumer demands for parties.
B
Helium has been proven to be lighter than air.
C
Scientists observed that helium will cause balloons to float.
D
Scientists have found that helium is naturally occurring.
23

Why is newton's first law of motion considered a law and not a theory?

A
It is an unsupported idea.
B
It is based on multiple observations.
C
It has never been tested.
D
It was validated by a singular experiment.
24

Which is a scientific claim?

A
At least 75 percent of the class will pass the physical science test today because they studied more than two hours for it.
B
According to the star of the number-one teen TV show, crushed rosemary and olive oil spread over pimples will draw out the bacteria and prevent scarring.
C
Plants fertilized once per week with Super Plant Food Formula have been shown in testing to produce twice as much fruit as plants that are not.
D
Placing half-filled one-gallon jugs of water out on the lawn prevents moles from occupying the space underground.
25

Alpa wants to change 0.54 kilometers into a smaller metric unit. She will have to

A
multiply.
B
divide.
C
add.
D
subtract.

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