Unit 2: Energy and Heat

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons through a conductor, such as a wire.

Front

What happens when ice is added to warm water?

Back

The ice melts as the water in the pool reaches thermal equilibrium, meaning the temperatures equalize.

Front

What types of energy does a television transform electrical energy into?

Back

A television transforms electrical energy into light, thermal (heat), and sound energy.

Front

Which object has the most thermal energy at the same temperature?

Back

An airplane at 70 degrees Fahrenheit has the most thermal energy due to its larger mass compared to a marble or a baseball bat.

Front

What is the energy transformation when a battery powers a device?

Back

The energy transformation is chemical energy from the battery converting to electromagnetic energy, which then produces light.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, such as gravitational potential energy.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.