When a wind-up toy is set into motion, elastic potential energy that was stored in a compressed spring is converted into the ____ energy of the toy's moving parts.

TRUE or FALSE: Energy in food is converted into muscle movement.

What form of energy: Travels through space in the form of waves.

Energy of motion is called ______.

TRUE or FALSE: Frictional forces enable a pendulum to continue swinging without slowing down.

At what point during a pole-vaulter's jump is his gravitational potential energy the greatest?

What type of energy? Kinetic, potential or both: A descending roller coaster car.

TRUE or FALSE: For a mechanical change in an isolated system, the mechanical energy at the beginning equals the mechanical energy at the end of the process, as long as friction is negligible.

A moving object slows down because friction causes a continual conversion of kinetic energy into ____ energy.

What form of energy: Energy stored in gasoline, coal and wood.

What form of energy: Produces the sun's heat and light.

What type of energy? Kinetic, potential or both: A car driving on a flat road.