Unit 4 Energy Review

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object. It is the energy associated with the motion and position of an object.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in a substance.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a ball held at a height has gravitational potential energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

Front

How does energy transfer occur?

Back

Energy transfer occurs when energy moves from one object or system to another, such as when heat moves from a hot object to a cooler one.

Front

What is light energy?

Back

Light energy is a form of energy that is visible to the human eye. It is produced by the vibrations of electrically charged particles.

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons. It is used to power devices and appliances.

Front

What is the relationship between potential energy and kinetic energy?

Back

Potential energy can be converted into kinetic energy. For example, when an object falls, its potential energy decreases while its kinetic energy increases.

Front

What is an example of mechanical energy in everyday life?

Back

An example of mechanical energy is a moving car, which has kinetic energy due to its motion and potential energy due to its height.

Front

What happens to light when it hits a mirror?

Back

When light hits a mirror, it reflects off the surface, changing direction but not losing energy.