States of Matter and Phase Changes

Front

What is a molecule?

Back

A group of atoms bonded together.

Tags

NGSS.MS-PS1-1

Front

Which state of matter has particles that are moving very fast?

Back

Gas.

Tags

NGSS.MS-PS1-4

Front

How does particle motion compare across the states of matter?

Back

Gases > liquids > solids.

Tags

NGSS.MS-PS1-4

Front

Why does ice float on water?

Back

Ice is less dense than water.

Front

What happens to particle motion when ice melts in a warm room?

Back

Particles speed up and the ice becomes a liquid.

Tags

NGSS.MS-PS1-4

Front

Define solid in terms of particle arrangement.

Back

Particles are closely packed together and vibrate in place.

Front

Define liquid in terms of particle arrangement.

Back

Particles are close together but can move past one another.

Tags

NGSS.MS-PS3-4

Front

Define gas in terms of particle arrangement.

Back

Particles are far apart and move freely.

Front

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

Back

Melting.

Tags

NGSS.MS-PS1-4

Front

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

Back

Evaporation.

Tags

NGSS.MS-PS1-4