States of Matter and Phase Changes

Front

What are the three main states of matter?

Back

Solid, Liquid, Gas.

Front

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

Back

Melting.

Front

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

Back

Freezing.

Front

What happens to the molecules in a solid when it is heated?

Back

They gain energy and begin to move more freely, eventually becoming a liquid.

Front

What is the state of matter that has a definite volume but no definite shape?

Back

Liquid.

Front

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

Back

Evaporation.

Front

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

Back

Condensation.

Front

What is plasma?

Back

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

Front

What happens to the energy of molecules during freezing?

Back

The energy decreases, causing molecules to move closer together and form a solid.

Front

What is sublimation?

Back

The process where a solid changes directly into a gas without becoming a liquid first.