Amplify Phase Change Test

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. 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?

• 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

Refrigerators are able to transfer energy out of a substance. At first, the substance is a gas. The refrigerator changes the phase of the substance by transferring energy out of it. How does this change affect the substance’s molecules?

After the phase change, the molecules move . . .

• slower, and they move away from each other.

• slower, and they move around each other.

• faster, and they move around each other.

• faster, and they move in place.

Tags

NGSS.MS-PS1-4

A company uses a substance that is a solid under normal conditions. This substance will be used in extreme conditions, which could make the substance’s molecules move faster and cause a phase change. How would this phase change occur, and how would the molecules of the substance be affected under these extreme conditions?

• out of the substance, and its molecules would move away from each other.

• out of the substance, and its molecules would move around each other.

• into the substance, and its molecules would move around each other.

• into the substance, and its molecules would move in place.

Tags

NGSS.MS-PS1-4

A chef finds a sealed container consisting of an ingredient that goes into his restaurant’s secret sauce. The ingredient’s molecules are moving in place. What will happen if the chef causes the ingredient to change phase by transferring energy into it?

After the phase change, the ingredient’s molecules will move . . .

• faster, and the ingredient will be a solid.

• faster, and the ingredient will be a liquid.

• slower, and the ingredient will be a solid.

• slower, and the ingredient will be a liquid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What takes place when a gas changes to a liquid?

• melting

• freezing

• evaporation

• condensation

Tags

NGSS.MS-PS1-4

What takes place when a liquid changes to a solid?

• condensation

• melting

• evaporation

• freezing

Tags

NGSS.MS-PS1-4

What takes place when a liquid changes to a gas?

• condensation

• melting

• evaporation

• freezing

Tags

NGSS.MS-PS1-4

Workers find two substances. One is a toxic chemical. The other is a safe chemical. Both chemicals are liquids at room temperature. As a test, the workers transfer the same amount of energy out of the two containers and find that only the toxic chemical changes phase. How is the toxic chemical different from the safe chemical?

• weaker attraction between its molecules than the safe chemical. Its molecules now move in place.

• weaker attraction between its molecules than the safe chemical. Its molecules now move around each other.

• stronger attraction between its molecules than the safe chemical. Its molecules now move away from each other.

• stronger attraction between its molecules than the safe chemical. Its molecules now move in place.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

NGSS.MS-PS3-5

A student left a jar of water outside his home. Water can be a solid, liquid, or gas. When he put the jar outside, the water was liquid. Twelve hours later, the water had changed phase and was a gas. What happened to the water molecules?

• When the student left the jar outside, the molecules were moving around each other. Later, the molecules were moving in place.

• When the student left the jar outside, the molecules were moving away from each other. Later, the molecules were moving around each other

• When the student left the jar outside, the molecules were moving in place. Later, the molecules were moving around each other.

• When the student left the jar outside, the molecules were moving around each other. Later, the molecules were moving away from each other.

Tags

NGSS.MS-PS1-4