Intro to Thermal Energy

Front

What does temperature measure in a substance?

Back

Temperature measures the average kinetic energy of the atoms in a substance.

Front

What type of energy does thermal energy come from?

Back

Thermal energy comes from the kinetic energy of the atoms and molecules that make up the matter.

Front

What happens to an object as its thermal energy increases?

Back

As its thermal energy increases, an object heats up.

Front

In which direction does thermal energy move?

Back

Thermal energy always moves from a warmer area to a cooler area.

Front

What type of chemical reaction can be used to heat up other substances?

Back

A chemical reaction that releases energy can be used to heat up other substances.

Front

Define thermal energy.

Back

Thermal energy is the total kinetic energy of all the particles in a substance.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion, which in this context refers to the motion of atoms and molecules.

Front

How does thermal energy affect the state of matter?

Back

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

Front

What is the relationship between temperature and thermal energy?

Back

Higher temperature indicates higher average kinetic energy, which means more thermal energy.

Front

What happens to the particles in a substance when it cools down?

Back

When a substance cools down, the particles lose kinetic energy and move slower.