Sam is doing an experiment with a substance whose molecules move in place. If he transfers energy into the substance and causes a phase change, what will happen?

The substance's molecules will move around each other.

The substance's molecules will move away from each other.

The substance's molecules will move in place.

The substance's molecules will stop moving.

Lance is doing an experiment with a substance whose molecules move around each other. If he transfers energy into the substance and causes a phase change, what will happen?

The substance's molecules will move away from each other.

The substance's molecules will move around each other.

The substance's molecules will move in place.

The substance's molecules will stop moving.

James is doing an experiment with a substance whose molecules move around each other. If he transfers energy out of the substance and causes a phase change, what will happen?

The substance's molecules will move in place.

The substance's molecules will move away from each other.

The substance's molecules will move around each other.

The substance's molecules will stop moving.

Joe is doing an experiment with a substance whose molecules move away from each other. If he transfers energy out of the substance and causes a phase change, what will happen?

The substance's molecules will move around each other.

The substance's molecules will move away from each other.

The substance's molecules will move in place.

The substance's molecules will stop moving.

Lyra found two sealed jars with different liquid substances in them. When she opened the jars and transferred energy into both substances, Material 1 changed phase, but Material 2 did not. How are the substances different?

Material 1 has a weaker molecular attraction. Its molecules now move away from each other.

Material 1 has a stronger molecular attraction. Its molecules now move in place.

Material 1 has a stronger molecular attraction. Its molecules now move away from each other.

Material 1 has a weaker molecular attraction. Its molecules now move in place.

Julie is doing an experiment with ice water. When she first started her experiment, the water temperature was 0 degrees Celsius. Two hours later, the water was 20 degrees Celsius. What happened to the water molecules during those two hours?

The molecules started moving faster.

The molecules got closer together.

Cindy is working with an unknown substance whose molecules are moving in place. She increased the speed of the molecules and caused a phase change. How did she do this and how did it affect the substance?

She transferred energy into the substance, and the substance changed to a liquid.

She transferred energy into the substance, and the substance changed to a gas.

She transferred energy out of the substance, and the substance changed to a gas.

She transferred energy out of the substance, and the substance changed to a liquid.

The same amount of energy was transferred into each substance shown. Which substance would change phase first and how would it change?

Substance 1 changed phase because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now more around each other.

Substance 1 changed phase because the the strong attraction between molecules made their movement slower. Its molecules now move in place.

Substance 2 changed phase because the weak attraction between molecules let them move faster. Its molecules now move around each other.

Substance 2 changed phase because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

Carlton claims that the molecules in his chair are not moving because his chair is not moving. Is he right?

No, because molecules are always moving no matter what phase a substance is in.

Yes, because the chair is sitting still, so are its molecules.

Yes, because the chair is solid, its molecules are too close together to move.

No, because there the chair doesn't have molecules. Since you can't see them, they must not be there.

What happens to molecules when their energy increases ?

It depends on the type of molecules.

Emily is cooking with some sugar (a solid). She transferred some energy into the sugar, but it remained a solid. Why did it not change phase?

The energy transferred in caused the molecules to move faster, but the increase in energy was not enough to overcome the attraction between molecules.

The energy transferred in caused the molecules to move slower, resulting in the sugar remaining a solid.

The energy transferred in did not change the speed of the molecules resulting in the sugar remaining a solid.

The energy transferred in caused the molecules to move faster, but the increase did not result in a phase change because there is no phase with more energy than a solid.

Two hot liquids of different substances are sitting on a table. Over time, only one changes to a solid. Why would this happen?

The substance that remained a liquid has a weaker molecular attraction than the one that changed to a solid.

The substance that remained a liquid has a stronger molecular attraction than the one that changed to a solid.

Both substances have the same molecular attraction, but more energy was transferred to the one that changed to a solid.

Both substances have the same molecular attraction, but more energy was transferred out of the one that changed to a solid.

Phase Change Unit Review

8th Grade

•

28 Qs

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Phase Change Unit Review

Quiz

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Science

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-4, MS-PS3-4, 5-PS1-3

Standards-aligned

Melissa Lavelle

Used 19+ times

FREE Resource

28 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The solid phase of a substance...

has molecules with the lowest amount of energy for that substance

has molecules with the highest amount of energy for that substance

has molecules with an energy level between the highest and lowest phases for that substance

has molecules with no energy

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The liquid phase of a substance...

has molecules with the lowest amount of energy for that substance

has molecules with the highest amount of energy for that substance

has molecules with an energy level between the highest and lowest phases for that substance

has molecules with no energy

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The gas phase of a substance...

has molecules with the lowest amount of energy for that substance

has molecules with the highest amount of energy for that substance

has molecules with an energy level between the highest and lowest phases for that substance

has molecules with no energy

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Solids...

have no visible shape and fills the container

takes the shape of the container

have a definite shape

Tags

NGSS.5-PS1-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Liquids...

have no visible shape and fills the container

takes the shape of the container

has a definite shape

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gases...

have no visible shape and fills the container

takes the shape of the container

has a definite shape

Tags

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What phase "flows"?

Gas

Liquid

Solid

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Phase Change Unit Review

28 questions

The solid phase of a substance...

The liquid phase of a substance...

The gas phase of a substance...

Solids...

Liquids...

Gases...

What phase "flows"?

What phase is "rigid"?

In which phase do the molecules move in place?

In which phase do the molecules move around each other?

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