Exam Review Changes of State of Matter (Science Bits)

Front

What is the process called when a liquid vaporizes only on the surface?

Back

Evaporation

Front

What happens to the molecules of a washer when it is heated and put into a slot?

Back

At first it slid right through, but after heating, the molecules expanded, increasing the volume, then it could not fit.

Front

What happens to the density of a substance when heat is applied?

Back

The density decreases.

Front

What is the temperature at which a liquid transforms into a gas called?

Back

Boiling point.

Front

What is the process called when a solid changes directly to a gas or gas to solid without melting?

Back

Sublimation.

Front

Define evaporation.

Back

The process by which molecules at the surface of a liquid gain enough energy to enter the gas phase.

Front

What is boiling?

Back

The rapid vaporization of a liquid that occurs when it reaches its boiling point.

Front

What is the melting point?

Back

The temperature at which a solid becomes a liquid.

Front

What is condensation?

Back

The process by which gas turns into a liquid.

Front

What is the relationship between temperature and the state of matter?

Back

Increasing temperature generally causes solids to become liquids and liquids to become gases.