Stemscopes Exam Physical Science 2

Question 1

Which form of heat transfer does NOT require matter?

Accepted Answer

Radiation

Answer

Radiation transfers heat through electromagnetic waves and can travel through a vacuum without matter.

Question 2

What is the law of conservation of energy?

Accepted Answer

Energy cannot be created or destroyed, only transformed

Answer

The law of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.

Question 3

A ball rolling down a ramp converts which type of energy into kinetic energy?

Accepted Answer

Gravitational potential energy

Answer

As the ball descends, gravitational potential energy is converted into kinetic energy.

Question 4

Which of the following is an example of a conductor?

Accepted Answer

Copper wire

Answer

Copper wire is a conductor because free electrons in copper allow electrical current to flow easily.

Question 5

What does the pitch of a sound wave depend on?

Accepted Answer

Frequency

Answer

Pitch is determined by the frequency of the sound wave; higher frequency produces higher pitch.

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