FCS Unit 2 Energy Review

Front

What is convection?

Back

Convection is the transfer of heat through a hot liquid or air that expands, becomes less dense, and rises, or becomes more dense and sinks.

Front

What energy conversion occurs in a hairdryer?

Back

A hairdryer converts electrical energy into thermal energy.

Front

What does the law of conservation of energy state?

Back

Energy can never be created or destroyed.

Front

Which process primarily transfers heat by moving air?

Back

Convection.

Front

Why does the handle of a metal spoon warm up in hot soup?

Back

Because of conduction.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is radiation?

Back

Radiation is the transfer of heat through electromagnetic waves.

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in an object, related to its temperature.

Front

What is density?

Back

Density is the mass of a substance divided by its volume.

Front

What is an example of convection in nature?

Back

Ocean currents are an example of convection.