Energy (5.1-5.2)

Only living things have energy.

• True

• False

An object at rest has no energy.

• True

• False

A singing bird converts the chemical energy stored in its body into sound energy.

• True

• False

Three identical boxes are stacked together. Which box has the largest amount of potential energy?

• P

• Q

• R

• They have the same amount of potential energy

Helen uses an electric kettle to heat some water. Which of the following statements about the water is correct?

• Electrical energy of water increases

• Electrical energy of water decreases

• Thermal energy of water decreases

• Thermal energy of water increases

What is the main energy conversion that takes place in a marathon runner?

• Chemical energy --> kinetic energy

• Potential energy --> kinetic energy

• Kinetic energy --> chemical energy

• Kinetic energy --> potential energy

A water turbine is pushed by the water flowing out of the pipe. Which of the following can increase the amount of kinetic energy of the turbine?

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2), and (3)

An electric toy car is powered by a battery. Which statements are correct?

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2), and (3)

Green leaves convert _____ energy from the Sun into chemical energy for storage.

• kinetic

• light

• potential

• electrical

Energy cannot be created out of nothing.

• True

• False