thermal energy

Front

What happens to molecules as heat moves through them?

Back

They begin to move faster.

Front

If butter at 80°C is poured on popcorn at 60°C, what will the final temperature be?

Back

70°C.

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in an object due to their motion.

Front

What is the relationship between temperature and molecular motion?

Back

As temperature increases, molecular motion increases.

Front

Can energy be destroyed?

Back

No, energy cannot be destroyed; it can only be transferred or transformed.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids and gases).

Front

What is radiation?

Back

Radiation is the transfer of heat through electromagnetic waves.

Front

What happens to the temperature of a substance when it absorbs heat?

Back

The temperature of the substance increases.

Front

What is the effect of heat on the state of matter?

Back

Heat can cause a substance to change from solid to liquid (melting) or from liquid to gas (evaporation).