Unit 5: Energy Review

An endothermic reaction is one that uses which form of energy?

• sound energy

• nuclear energy

• electrical energy

• chemical energy

Which statement best describes the law of conservation of energy?

• Energy cannot be created or destroyed.

• The conservation of energy is unrelated to the conversion of energy.

• We need to conserve our natural resources.

• Energy can be destroyed but not created.

Light waves from the sun can be converted to electricity through __________.

• a solar cell

• a hydroelectric dam

• the process of fission

• an electric heater

The conversion of chemical energy to mechanical energy is best described by which example?

• electricity boiling water

• fuel being combusted to power a rocket

• sunlight warming the ground

Which of the following is the best definition of energy?

• the ability to produce fusion

• the ability to generate electricity

• the ability to generate heat

• the ability to do work

The energy of motion best describes which of the following?

• potential energy

• the energy of an electrical charge

• kinetic energy

• the energy of fusion

Which of the following is the best example of potential energy?

• a ball sitting at the bottom of a hill

• a ball rolling down a hill

• a ball sitting at the top of a hill

Which of the following is an example of kinetic energy?

• a car sitting motionless

• a sled sitting at the top of a hill

• a tank containing gasoline

• a girl running in a race

The water held by a dam is an example of which of the following?

• potential energy

• kinetic energy

• chemical energy

• electrical energy

What does the kinetic theory explain?

• Heat is due to potential energy.

• Heat is due to Pascal's principle.

• Heat is due to temperature.

• Heat is due to the motion of molecules.