7th grade End of Term

Front

Bubbles form in boiling water. This happens because _____________.

Back

the water is changing from a liquid to a gas.

Front

The temperature at which a liquid turns into a solid is called the __________.

Back

freezing point.

Front

As a substance changes at constant pressure from a solid to a liquid and then to a gas, what happens to the kinetic energy of the particles?

Back

The kinetic energy increases because the speed of the particles is increasing.

Front

The temperature at which a liquid changes to a gas is its __________.

Back

boiling point.

Front

If a substance has a lot of thermal energy, its atoms and molecules are __________.

Back

moving very rapidly.

Front

What is the process called when a solid turns into a liquid?

Back

Melting.

Front

What is the process called when a gas turns into a liquid?

Back

Condensation.

Front

What is the temperature at which a solid turns into a liquid called?

Back

Melting point.

Front

What is the term for the amount of energy required to raise the temperature of a substance?

Back

Specific heat.

Front

What happens to the particles of a substance as it heats up?

Back

The particles move faster and spread apart.