Introduction to Energy

Question 1

Which statement best defines energy?

Revolt · Accepted Answer

Energy is the ability to do work.

Question 2

shelf B [___]

Revolt · Accepted Answer

stays the same

Question 3

shelf C [___]

Revolt · Accepted Answer

decreases

Question 4

Work transfers [___] between objects.

Revolt · Accepted Answer

energy

Question 5

A catapult’s lever holds a cannonball. The lever is attached to a tightly held rope. When the rope is released, the lever springs forward and launches the cannonball. When the rope is held tightly, which form of energy does it possess?

Revolt · Accepted Answer

elastic

Question 6

shelf A [___]

Revolt · Accepted Answer

increases; Selection 1: increases; Selection 2: stays the same; Selection 3: decreases

Question 7

A windmill’s blades move from the blowing wind. The movement of the blades represents [___] energy.

Revolt · Accepted Answer

87834; 87835; kinetic

Question 8

A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the same floor at 3 m/s. Which ball has greater kinetic energy, and why?

Revolt · Accepted Answer

The red ball has greater kinetic energy, because it has a greater mass.

Question 9

Inside stars in space, the nuclei of hydrogen atoms fuse together to form helium atoms. This represents which form of energy?

Revolt · Accepted Answer

nuclear energy

Question 10

The visible light that allows people to see where they are going describes [___] energy.

Revolt · Accepted Answer

radiant

Introduction to Energy Answers

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