Phase Change Unit Assessment

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

• freedom of movement
• atom
• condensation
• evaporation

Tags

NGSS.MS-PS1-4

Which object has molecules that are moving?

• Only the water in the glass has molecules that are moving.

• Only the water in the ocean has molecules that are moving.

• Both have molecules that are moving.

• Neither has molecules that are moving.

Tags

NGSS.MS-PS1-4

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The fuel tank of an airplane has a device that measures the fuel’s temperature. Before the airplane took off, the temperature of the fuel was 27°C. After the airplane had been flying for one hour, the temperature of the fuel had decreased to 3°C. Which of the following must have happened to the molecules of the fuel?

• The molecules got farther apart.

• The molecules started moving slower.

• The fuel gained cold molecules.

• The molecules became smaller in size.

Tags

NGSS.MS-PS1-4

If you have a liquid that changes to a gas, explain it's freedom of movement in both phases.

• molecules move away from each other, then around each other
• molecules move in place, then around each other
• molecules move around each other, then away from each other
• molecules move around each other, then in place

Tags

NGSS.MS-PS1-4

An Earth scientist brought an unknown substance from underground back to her lab. The substance was in the gas phase and was put into a sealed tank as shown above. She slowed down the molecules inside the tank and the substance changed phase. How did she do this, and how did it affect the molecules?

She transferred energy . . .

• into the substance, and the molecules moved around each other.

• into the substance, and the molecules moved away from each other.

• out of the substance, and the molecules moved around each other.

• out of the substance, and the molecules moved in place

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

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

• evaporation
• precipitation
• condensation
• sublimation

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the water was a liquid. Then, the scientists transferred energy out of the substance, and the water changed phase. What happened to the movement of the water molecules?

After the phase change, the water molecules moved . . .

• faster and started moving away from each other.

• faster and started moving around each other.

• slower and started moving in place.

• slower and started moving around each other.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

What's the change of state to go from a solid to a liquid?

• Freezing

• Melting

• Evaporation

• Condensation

Tags

NGSS.MS-PS1-4

What best describes the macro and molecular scale appearance of a Liquid?

• Rigid, Keeps its shape, locked together and only move in place

• Fills the container and has no visible shape, free to move around and fly apart

• Flows and takes shape of its container, can move and flow around each other