6 P 2

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

A helium balloon is taken outside on a very cold day. The balloon wrinkles and becomes a little smaller, but returns to its normal size when it is taken back inside the warm house. Why does the balloon inflate when it reenters the warm house?

• The warmer temperature causes the gas in the balloon to expand.

• The warmer temperature causes the gas in the balloon to contract.

• The warmer temperature causes the gas in the balloon to turn into a solid.

• The warmer temperature causes more gas to enter the balloon, and it expands.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The graph shows a heating curve for water. Which point on the graph indicates that all of the liquid water has been converted to water vapor?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-4

According to the particle theory of matter, there is space between the small particles that make up matter. The space between particles differs depending on the state of the matter. Which list ranks the states of matter, according to the spacing between particles, from largest to smallest?

• solid, liquid, gas

• gas, solid, liquid

• liquid, gas, solid

• gas, liquid, solid

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

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

NGSS.MS-PS3-4

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

NGSS.MS-PS3-5

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

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