Thermal Energy Unit Review

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

How do molecules behave when a substance is heated?

Back

When a substance is heated, its molecules move faster and have more energy.

Front

What happens to the energy of a substance when its temperature decreases?

Back

The energy of the substance decreases as its temperature decreases.

Front

What is the relationship between temperature and molecular motion?

Back

As temperature increases, molecular motion increases; as temperature decreases, molecular motion decreases.

Front

What occurs during heat transfer?

Back

Heat transfer occurs when thermal energy moves from a warmer object to a cooler object.

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 and gases).

Front

What is radiation?

Back

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

Front

What happens to the molecules of water when it freezes?

Back

When water freezes, its molecules lose energy and move closer together, forming a solid structure.

Front

What is the effect of mass on thermal energy transfer?

Back

The greater the mass of an object, the more thermal energy it can store and transfer.