Quiz about Phase Change Unit Review

Question 1

The solid phase of a substance...

Accepted Answer

has molecules with the lowest amount of energy for that substance

Answer

has molecules with the highest amount of energy for that substance

Answer

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

Answer

has molecules with no energy

Question 2

The liquid phase of a substance...

Accepted Answer

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

Answer

has molecules with the lowest amount of energy for that substance

Answer

has molecules with the highest amount of energy for that substance

Answer

has molecules with no energy

Question 3

The gas phase of a substance...

Accepted Answer

has molecules with the highest amount of energy for that substance

Answer

has molecules with the lowest amount of energy for that substance

Answer

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

Answer

has molecules with no energy

Question 4

Solids...

Accepted Answer

have a definite shape

Answer

have no visible shape and fills the container

Answer

takes the shape of the container

Question 5

Liquids...

Accepted Answer

takes the shape of the container

Answer

have no visible shape and fills the container

Answer

has a definite shape

Question 6

Gases...

Accepted Answer

have no visible shape and fills the container

Answer

takes the shape of the container

Answer

has a definite shape

Question 7

What phase "flows"?

Accepted Answer

Liquid

Answer

Gas

Answer

Solid

Question 8

What phase is "rigid"?

Accepted Answer

Solid

Answer

Gas

Answer

Liquid

Question 9

In which phase do the molecules move in place?

Accepted Answer

Solid

Answer

Gas

Answer

Liquid

Question 10

In which phase do the molecules move around each other?

Accepted Answer

Liquid

Answer

Gas

Answer

Solid

Question 11

In which phase do the molecules move away from each other?

Accepted Answer

Gas

Answer

Liquid

Answer

Solid

Question 12

Which image best represents a solid?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Question 13

Which image best represents a liquid?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Question 14

Which image best represents a gas?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Question 15

Which molecules have the most freedom of movement?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Question 16

Temperature is a measure of the average kinetic energy of the molecules of a substance. What is the temperature of this substance?

Accepted Answer

KE = 16j

Answer

KE = 144j

Answer

KE = 18j

Answer

KE = 14j

Question 17

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?

Accepted Answer

The substance's molecules will move around each other.

Answer

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

Answer

The substance's molecules will move in place.

Answer

The substance's molecules will stop moving.

Question 18

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?

Accepted Answer

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

Answer

The substance's molecules will move around each other.

Answer

The substance's molecules will move in place.

Answer

The substance's molecules will stop moving.

Question 19

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?

Accepted Answer

The substance's molecules will move in place.

Answer

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

Answer

The substance's molecules will move around each other.

Answer

The substance's molecules will stop moving.

Question 20

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?

Accepted Answer

The substance's molecules will move around each other.

Answer

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

Answer

The substance's molecules will move in place.

Answer

The substance's molecules will stop moving.

Question 21

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 22

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?

Accepted Answer

The molecules started moving faster.

Answer

The molecules got closer together.

Answer

The water lost cold molecules.

Answer

The molecules became larger.

Question 23

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 24

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

Accepted Answer

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.

Answer

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

Answer

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

Answer

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.

Question 25

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

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 26

What happens to molecules when their energy increases?

Accepted Answer

They move faster.

Answer

They move slower.

Answer

They get bigger.

Answer

It depends on the type of molecules.

Question 27

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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.

Question 28

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

Accepted Answer

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

Answer

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

Answer

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

Answer

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

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