Energy Unit Review

Mechanical energy is the sum of an object's kinetic and potential energy.

• true

• false

The kinetic theory of matter states that all of the particles that make up matter are in a fixed position.

• true

• false

Heat is the energy transferred from an object at a higher temperature to an object at a lower temperature.

• true

• false

How could two objects have the same temperature but different thermal energies?

• One object could have more heat.

• One object could have more calories.

• One object could have more particles and lesser total kinetic energy.

• One object could have more particles and greater total kinetic energy.

Energy exists in different forms. Which of the following forms of energy best describes the energy stored in food?

• electromagnetic energy

• mechanical energy

• sound energy

• chemical energy

Which of the following is the transfer of energy as heat by the movement of a liquid or a gas?

• conduction

• convection

• emission

• radiation

Which of the following terms means the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius?

• heat

• temperature

• thermal energy

• calorie

What is the difference between a conductor and an insulator?

• Wood is a good conductor but not a good insulator.

• Metal is a good insulator but not a good conductor.

• A conductor transmits energy very well while an insulator does not.

• An insulator transmits energy very well while a conductor does not.

Which statement best describes the law of conservation of energy?

• The amount of kinetic energy in a system is a constant value.

• An object can have potential energy or kinetic energy, but not both at the same time.

• Energy can be converted from one form to another, but it cannot be created or destroyed.

• The amount of energy created when an object starts moving is equal to that destroyed when it stops moving.

How is temperature related to heat?

• Temperature is a measure of the heat of an object.

• Heat causes a change in the temperature of an object.

• Raising the temperature causes the heat of an object to increase.

• Temperature and heat are two ways to measure the same thing.