6.P.2.2 Phase Change

This diagram shows the particles that make up three different substances. What state of matter does Substance 1 most likely exhibit?

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS1-1

The diagram below compares the movement of water particles when the water is cold compared to when it is hot.

• The particles in the cold water move more slowly.

• The particles in the cold water move more quickly.

• The particles in the cold water move more freely.

• The particles in the cold water do not move at all.

Tags

NGSS.MS-PS1-4

A container of water is heated to 100°C. At this temperature, what will happen to the water?

• It will boil, and the molecules will move more quickly.

• It will melt, and the molecules will move more slowly.

• It will freeze, and the molecules will move more slowly.

• It will condense, and the molecules will move more quickly.

Tags

NGSS.MS-PS1-4

In the lab, Ann cools a closed container containing 50 grams of steam until all of the steam becomes a liquid. She then cools the container until the liquid water freezes. Which remains constant during all of these changes?

• mass

• pressure

• state

• volume

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which factor is most important for determining the phase in which a substance exists?

• its mass

• its density

• its volume

• its temperature

Tags

NGSS.MS-PS1-4

What will happen to a sample of tap water when it is cooled in a refrigerator?

• The motion of the water particles will speed up.

• The motion of the water particles will slow down.

• The motion of the water particles will stop completely.

• The motion of the water particles will remain the same.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Scientists are observing molecules by using an advanced electron microscope. They notice the molecules are beginning to move faster. What is most likely happening?

• Heat is being added, and a gas is turning into a liquid.

• Heat is being added, and a solid is turning into a liquid.

• Heat is being removed, and a gas is turning into a solid.

• Heat is being removed, and a liquid is turning into a solid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A scientist heats a sample of liquid water. How will the heating affect the water particles?

• The particles will move slower.

• The particles will move faster.

• The particles will gain mass.

• The particles will lose mass.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which phase change causes an increase in the motion of atoms?

• liquid to solid

• gas to liquid

• liquid to gas

• gas to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Liquid water is cooled from 25°C to 15°C. What happens to the water particles during the cooling?

• They speed up.

• They slow down.

• They stop moving.

• They remain the same.

Tags

NGSS.MS-PS1-4