Unit 3 Thermal Energy Test Corrections

Front

What is thermal energy?

Back

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

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of thermal energy through electromagnetic waves, such as sunlight.

Front

How does temperature affect molecular movement?

Back

Higher temperatures increase the kinetic energy of molecules, causing them to move faster, while lower temperatures decrease their kinetic energy.

Front

What happens to the kinetic energy of water molecules in the shade compared to those in sunlight?

Back

The molecules in the beaker that is in the shade have less kinetic energy than the molecules of the beaker in the sunlight.

Front

True or False: Lower temperatures have molecules that move at a faster rate.

Back

False. Lower temperatures result in slower molecular movement.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is an egg frying in a pan, where heat is transferred from the pan to the egg.

Front

What is an example of convection in everyday life?

Back

An example of convection is the warm air rising and cool air sinking in a room heated by a radiator.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the heat from the sun on your skin.