Energy is...

• When the surfaces of two objects rub against each other.

• The ability to do work.

Which of the following is the best example of increasing an object's potential energy?

• Rolling a bowling ball.

• Turning on a light bulb.

• Stretching a rubber band.

• Dropping a pencil.

Which of the following is a conversion from chemical energy to thermal energy?

• Coal is burned at a power plant.

• Gasoline is burned in a car engine.

• Charcoal is burned in a barbeque pit.

• All of the above.

An object that has kinetic energy must be...

• Lifted above earth's surface.

• In motion.

• At rest.

• None of the above.

Thermal energy is...

• Kinetic

• Potential

• Both kinetic and potential.

• Neither kinetic nor potential.

Sound energy is...

• The energy of a compound that changes as its atoms are rearranged to form new compounds.

• The total energy of the particles that make up an object.

• The energy caused by an object's vibrations.

• The energy of motion.

What device converts chemical energy to mechanical energy?

• Human

• Car

• Jet ski

• All of the above.

As height increases, so does...

• Thermal energy.

• Mechanical energy

• Kinetic energy.

• Potential energy.

The law of _________________ of energy states that energy cannot be created or destroyed.

• Transformation

• Absorption

• Conservation

• Stability

According to the law of conservation of energy, in theory, a bouncy ball should never stop bouncing. However, we know that it eventually stops. Where does the energy go?

• Some get converted into sound energy and escape into the surroundings.

• Some get converted into thermal energy and escape into the surroundings.

• Both of them.