Question 1

What is the Law of Conservation of Energy?

Accepted Answer

"Energy is never created or destroyed"

Answer

"Energy is never destroyed"

Answer

"Sometimes energy is created"

Answer

"Energy changes from one form to another"

Question 2

Which of the following has the most potential energy?

Accepted Answer

A heavy book on a high shelf

Answer

A light magazine on the floor

Answer

A heavy book on the floor

Answer

A light magazine on a high shelf

Question 3

Kinetic energy is...

Accepted Answer

Energy of movement

Answer

Stored energy

Answer

Energy of moving electrons

Answer

Energy of heat

Question 4

A pendulum slows down over time because of friction. What happens to the energy?

Accepted Answer

The total energy level stays the same. KE and PE turn into thermal energy.

Answer

The total energy goes down. The pendulum isn't moving, so it has less energy.

Answer

The total energy goes down. PE and KE are reduced.

Answer

The total energy stays the same. All the KE turns into PE

Question 5

You eat a whole pizza, then you go help your friend lift heavy boxes. Describe the energy change.

Accepted Answer

Chemical energy from the food turns into the kinetic energy of moving the boxes.

Answer

Kinetic energy in the food turns into potential energy of the boxes.

Answer

Food energy turns into kinetic energy of moving the boxes.

Answer

There is no energy change, since energy is never created or destroyed.

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