Thermal Energy

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

Which has more thermal energy: a hot cup of tea or a huge lake?

Back

A huge lake has more thermal energy because it contains a larger amount of water, even if its temperature is lower.

Front

What happens to molecules in a hot substance?

Back

The molecules are moving very fast.

Front

What is temperature?

Back

Temperature is the measure of the average speed of the molecules that make up a substance.

Front

What does it mean for samples to be at equilibrium?

Back

It means that the samples have the same temperature and thermal energy.

Front

Which temperature is the coldest: 10℃, 25℃, 70℃, or 75℃?

Back

10℃ is the coldest.

Front

How does thermal energy transfer occur?

Back

Thermal energy transfer occurs through conduction, convection, and radiation.

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).

Front

What is radiation?

Back

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