Phase Change Unit Test Review

The way molecules in a substance move around relative to each other

• Kinetic Energy

• Molecule

• Phase

• Freedom of Movement

Tags

NGSS.MS-PS1-4

A pull between two molecules that is always the same for a substance

• Kinetic Energy

• Molecular Attraction

• Molecule

• Mixture

Tags

NGSS.MS-PS1-1

The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine?

She transfers energy . . .

• into the medicine until it is a liquid.

• into the medicine until it is a gas.

• out of the medicine until it is a solid.

• out of the medicine until it is a liquid.

Tags

NGSS.MS-PS1-4

Phase change going from Liquid to Solid...

• Melting

• Freezing

• Condensation

• Sublimation

Tags

NGSS.MS-PS1-4

Phase change going from a Solid to a Liquid...

• Freezing

• Condensation

• Melting

• Sublimation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to particles when they are heated?

• They speed up and spread out
• They slow down and compress
• They stop moving
• They move closer together and speed up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

7. All phase changes (changing states) requires energy to be added or taken away.

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is true about the molecules within a solid?

• particles in solids are moving freely around each other.

• particles in solids have no motion.

• particles in solids are vibrating in place.

• particles in solids have more motion than in liquids

Tags

NGSS.MS-PS1-4

How do the molecules in a gas behave?

• move in place

• move around each other

• move away from each other

• do not move

A substance's molecules are moving around each other. What will happen if you transfer energy into the substance and cause a phase change?

• molecules will move slower, substance will be a solid

• molecules will move slower, substance will be a liquid

• molecules will move faster, substance will be a liquid

• molecules will move faster, substance will be a gas

Tags

NGSS.MS-PS1-4