Phase Changes of Matter

Front

What is a gas?

Back

A state of matter where particles move very rapidly in all directions, are at great distances from one another, and have less effect from attractive forces.

Front

Give examples of gases.

Back

Oxygen, carbon dioxide, helium, steam (water vapor), ozone, hydrogen, air.

Front

What is sublimation?

Back

The process where a solid changes directly into a gas without passing through the liquid phase, such as dry ice turning into carbon dioxide gas.

Front

Describe the shape and volume of a gas.

Back

A gas has an indefinite shape and volume, taking the shape and volume of its container.

Front

What is melting?

Back

The process when particles in a solid gain enough energy to become a liquid.

Front

What happens during freezing?

Back

The process where a liquid loses energy and changes into a solid.

Front

Define boiling.

Back

The process where a liquid gains enough energy to change into a gas.

Front

What is deposition?

Back

The process where a gas changes directly into a solid without passing through the liquid phase.

Front

What is the difference between a solid and a liquid?

Back

A solid has a definite shape and volume, while a liquid has a definite volume but takes the shape of its container.

Front

What is plasma?

Back

A state of matter where gas is energized until atomic electrons are no longer associated with the nucleus.