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

molecules move around each other, then away from each other

molecules move away from each other, then around each other

molecules move in place, then around each other

molecules move around each other, then in place

If molecules in a substance move in place and energy is transferred into the substance

then molecules will move faster, and it will be a liquid

then molecules move slower, and it will be a solid

then molecules will move faster, and it will be a solid

then molecules will move slower, and it will be a liquid

Before: molecules move around each other, After: molecules move in place

Before, the substance was a liquid and later a solid.

Before, the substance was a solid and later a liquid.

Before,the substance was a gas, and later a liquid.

Before,the substance was a liquid, and later a gas.

If energy is taken out of the substance, and the substance changed into a liquid,

the substance started as a solid

the substance started as a liquid

What happens to molecules when kinetic energy increases?

it depends on the types of molecules

Substance A has a strong molecular attraction and is a solid at 15 degrees C. Substance B has a very weak molecular attraction and is a liquid at 15 degrees C. If energy is transferred into both substances equally which substances is more likely to be a gas at 50 degrees C?

Substance B (because the molecules are only weakly attracted to each other)

Substance A (because the molecules are strongly attracted to each other)

Neither substance because when energy is transferred in kinetic energy is decreased

Both substances because any time energy is transferred in all substances always change phase

Substance A has a strong molecular attraction and is a gas at 100 degrees C. Substance B has a very weak molecular attraction and is a gas at 100 degrees C. As energy is transferred out of both substances equally which substances is more likely to change phase to a liquid at 70 degrees C?

Substance B (because the molecules are only weakly attracted to each other)

Substance A (because the molecules are strongly attracted to each other)

Neither substance because when energy is transferred out kinetic energy is increased

Both substances because any time energy is transferred out all substances always change phase

**Choose all that apply** Molecular attraction...

causes the molecules of a substance to be attracted to each other

prevents all substances from ever changing phase

Phase Change

Quiz

•

Science

•

6th - 8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-4, MS-PS3-1, MS-PS1-1

+2

Standards-aligned

Brandon Lilly

Used 72+ times

FREE Resource

22 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a substance melts, the kinetic energy _____________.

decreases

stays the same

increases

decreases then increases

Tags

NGSS.MS-PS1-4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When molecules flow around each other, they are in this phase

solid

liquid

gas

plasma

Tags

NGSS.MS-PS1-4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The molecules in this picture are in what phase?

solid

liquid

gas

plasma

Tags

NGSS.MS-PS1-4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If this substance had kinetic energy ADDED, it would be in what phase?

solid

liquid

gas

plasma

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Sam had a solid and added energy to it. What did the molecules look like?

The molecules moved in place.

The molecules moved away from each other.

The molecules didn't move.

The molecules moved around each other.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the energy that an object has because it is moving?

kinetic

potential

electric

wind

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What takes place when a liquid changes to a gas?

condensation

melting

evaporation

freezing

Tags

NGSS.MS-PS1-4

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Phase Change

22 questions

When a substance melts, the kinetic energy _____________.

When molecules flow around each other, they are in this phase

The molecules in this picture are in what phase?

If this substance had kinetic energy ADDED, it would be in what phase?

Sam had a solid and added energy to it. What did the molecules look like?

What is the energy that an object has because it is moving?

What takes place when a liquid changes to a gas?

What is a group of atoms joined together called?

What takes place when a solid changes to a liquid?

What is the average kinetic energy of a substance called?

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