What is true about the molecules within a solid?

particles in solids are vibrating in place.

particles in solids are moving freely around each other.

particles in solids have no motion.

particles in solids have more motion than in liquids

A substance's molecules are moving around each other. What will happen if you transfer energy into the substance and cause a phase change?

molecules will move faster, substance will be a gas

molecules will move slower, substance will be a solid

molecules will move slower, substance will be a liquid

molecules will move faster, substance will be a liquid

You have two substances at room temperature. Both substances are a liquid. You transfer the same amount of energy out of both substances but only one substance changes phase. What happened?

the substance with the stronger attraction will turn to a solid

the substance with the weaker attraction will change to a gas

the substance with the stronger attraction will turn to a gas

the substance with the weaker attraction will turn to a solid

You have a substance that is a liquid. You transfer energy out of the substance and it changes phases. What happened to the movement of the molecules?

moved slower and started moving in place

moved faster and started moving away from each other

moved faster and started moving around each other

moved slower and started moving around each other

Joshua left a soda outside on a snowy day. When he found it later, the liquid was frozen. What happened to the molecules?

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

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

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

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

Butter is a solid at room temperature. Oil is a liquid at room temperature. If we add heat to both, butter becomes a liquid while oil continues to be a liquid. How is butter different than oil?

Butter has a weaker attraction between its molecules than oil. Its molecules now move around each other.

Butter has a weaker attraction between its molecules than oil. It's molecules now move in place.

Butter has a stronger attraction between its molecules than oil. Its molecules now move away from each other.

Butter has a stronger attraction between its molecules than oil. Its molecules now move around each other.

Fred measured the temperature of his little sister's kiddie pool in the morning. It was 15 degrees Celsius. When he came home from school in the afternoon, the temperature was higher. What happened to the molecules while he was at school?

The molecules increased in size

Marissa put a pot of water on a hot stove. After a while the water began to boil and the level of the water went down. What did she do and how did it affect the water?

She transferred energy in and the substance changed to a gas.

She transferred energy in and the substance changed into a solid.

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

She transferred energy out and the substance changed to a solid.

If you transfer energy out of liquid water enough for a phase change to occur, what happens to the molecules?

They move faster and away from each other.

They move slower and around each other.

If you transfer energy into of liquid water enough for a phase change to occur, what happens to the molecules?

They move faster and away from each other.

They move slower and around each other.

If you transfer energy into salt water and sugar water, the salt water will evaporate faster. This is because the salt water has a...

weaker attraction between its molecules than the green substance. Its molecules now move away from each other.

weaker attraction between its molecules than the green substance. Its molecules now move in place.

stronger attraction between its molecules than the green substance. Its molecules now move away from each other.

stronger attraction between its molecules than the green substance. Its molecules move around each other.

Phase Change Unit Test Review

Authored by Charles Martinez

Science

6th - 8th Grade

NGSS covered

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26 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Kinetic Energy

Molecule

Phase

Freedom of Movement

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A pull between two molecules that is always the same for a substance

Kinetic Energy

Molecular Attraction

Molecule

Mixture

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine?
She transfers energy . . .

into the medicine until it is a liquid.

into the medicine until it is a gas.

out of the medicine until it is a solid.

out of the medicine until it is a liquid.

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Phase change going from Liquid to Solid...

Melting

Freezing

Condensation

Sublimation

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Phase change going from a Solid to a Liquid...

Freezing

Condensation

Melting

Sublimation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to particles when they are heated?

They speed up and spread out

They slow down and compress

They stop moving

They move closer together and speed up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7. All phase changes (changing states) requires energy to be added or taken away.

True

False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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Phase Change Unit Test Review

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

A pull between two molecules that is always the same for a substance

The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine?She transfers energy . . .

Phase change going from Liquid to Solid...

Phase change going from a Solid to a Liquid...

What happens to particles when they are heated?

7. All phase changes (changing states) requires energy to be added or taken away.

What is true about the molecules within a solid?

How do the molecules in a gas behave?

A substance's molecules are moving around each other. What will happen if you transfer energy into the substance and cause a phase change?

Access all questions and much more by creating a free account

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Popular Resources on Wayground

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The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine?
She transfers energy . . .