Questions: Energy Transfer

Question 1

When a rolling ball hits a stationary ball and the stationary ball starts moving, what happened?

• A. New energy was created in the second ball
• B. Energy transferred from the first ball to the second ball
• C. The second ball used its own stored energy
• D. Nothing happened to the energy

Answer: (B)

The first ball's kinetic energy was transferred to the second ball during the collision, causing it to move.

Question 2

Heat energy can transfer from the Sun to the Earth even through empty space.

• T. True
• F. False

Answer: True

The Sun's energy travels through space as radiation (light and heat waves) and does not need a material to travel through.

Question 3

Give one everyday example of energy being transferred from one object to another.

Model answer: A hot cup of cocoa warming your hands (also acceptable: a bat hitting a ball, the Sun warming the ground, a heater warming a room).

When you hold a hot mug, heat energy from the mug transfers to your cooler hands, warming them up.