Phase Changes

Front

What happens to particles when they are heated?

Back

They speed up and spread out.

Front

Do all phase changes require energy to be added or taken away?

Back

True.

Front

Which state of matter has molecules that slide past each other but stay close together?

Back

Liquid.

Front

How are solids different from liquids?

Back

Particles in solids are vibrating in place.

Front

When the temperature of matter increases, what happens to the particles?

Back

They speed up and move farther apart.

Front

What is a phase change?

Back

A transition of matter from one state to another, such as solid to liquid.

Front

What is the state of matter with a definite shape and volume?

Back

Solid.

Front

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

Back

Liquid.

Front

What is the state of matter that has neither a definite shape nor a definite volume?

Back

Gas.

Front

What happens to the energy of particles during melting?

Back

Energy is added, causing particles to move apart.