Unit 2: Energy Transfer Test Review

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

Front

What direction does heat flow?

Back

Heat flows from areas of higher temperature to areas of lower 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 conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids.

Front

What is convection?

Back

Convection is the transfer of heat by the movement of fluids (liquids or gases) due to differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, and does not require a medium.

Front

Why do railroad tracks have gaps?

Back

Railroad tracks have gaps to allow for expansion and contraction due to temperature changes, preventing the tracks from breaking.

Front

What is an insulator?

Back

An insulator is a material that does not conduct heat well, preventing heat transfer.

Front

What is a conductor?

Back

A conductor is a material that allows heat or electricity to flow through it easily.

Front

What happens to materials when they are heated?

Back

Most materials expand when heated due to increased kinetic energy of their particles.