Phase Change

A student left a sealed jar of water in her freezer. When she returned twelve hours later, the water had changed phase and was a solid. What happened to the water molecules?

• Before, the molecules were moving in place. After, the molecules were moving around each other.

• Before, the molecules were moving around each other. After, the molecules were moving in place.
  

• Before, the molecules were moving away from each other. After, the molecules were moving around each other.
  

Tags

NGSS.MS-PS1-4

A scientist has a container with a substance inside. What change did the scientist observe in the substance?

• Before, the substance was a gas. Later, it was a liquid.

• Before, the substance was a liquid. Later, it was a solid.

• Before, the substance was a liquid. Later, it was a gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following terms identifies the change from a liquid to gas?

• Evaporation

• Condensation

• Melting

• Freezing

Tags

NGSS.MS-PS1-4

Which of the following terms identifies the change from a liquid to solid?

• Melting

• Condensation

• Evaporation

• Freezing

Tags

NGSS.MS-PS1-4

Study the diagram below. The material begins to condense at point:

• 1

• 2

• 3

Tags

NGSS.MS-PS1-4

A car mechanic had a sealed bucket containing a substance in the gas phase. She left the bucket outside over the weekend. When she returned, the substance had changed phase, and the substance was in the liquid phase. What happened to the molecules of this substance?

• Before the mechanic left, the molecules were moving away from each other. When she returned, they were moving around each other.

• Before the mechanic left, the molecules were moving around each other. When she returned, they were moving in place.

• Before the mechanic left, the molecules were moving around each other. When she returned, they were moving away from each other.

• Before the mechanic left, the molecules were moving in place. When she returned, they were moving around each other.

Tags

NGSS.MS-PS1-4

The phase change from water vapor to liquid water is known as...

• evaporation

• precipitation

• condensation

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

You have dropped your popsicle and are watching it become a LIQUID. Which answer BEST explains what PHASE CHANGE has occurred AND how the molecule MOVEMENT has changed?

• The PHASE CHANGE that has occurred is CONDENSATION and the molecule MOVEMENT has become FASTER.

• The PHASE CHANGE that has occurred is EVAPORATION and the molecule MOVEMENT has become SLOWER.

• The PHASE CHANGE that has occurred is MELTNG and the molecule MOVEMENT has become FASTER.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The molecules in this picture are in what phase?

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Based on the simulation, what phase of matter did this substance START as?

• Solid

• Liquid

• Gas

Tags

NGSS.MS-PS1-4