Thermal Energy 7th Grade Science

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance, which determines 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 and 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 light, without the need for a medium.

Front

Why does a metal spoon feel colder than a wooden spoon at room temperature?

Back

Metal is a better conductor of heat than wood, so it draws heat away from your hand more quickly.

Front

What happens to the density of a fluid when it is heated?

Back

When a fluid is heated, it becomes less dense and tends to rise.

Front

What is the relationship between temperature and thermal energy?

Back

As the temperature of a substance increases, its thermal energy also increases.

Front

How does thermal energy transfer occur in a pot of boiling water?

Back

Thermal energy is transferred from the burner to the pot (conduction), and then from the pot to the water (conduction), causing the water to circulate (convection).

Front

What is the effect of thermal energy on the state of matter?

Back

Increasing thermal energy can change a substance from solid to liquid (melting) or from liquid to gas (evaporation).

Front

What is an example of radiation in everyday life?

Back

The warmth felt from the sun on your skin is an example of thermal energy transfer through radiation.