Phase Changes and Molecular Attraction

How do the molecules in a solid behave?

• Move around each other

• move in place

• Moving away from each other

• Do not move

How do the molecules in a gas behave?

• move in place

• move around each other

• move away from each other

• do not move

Tags

NGSS.MS-PS1-4

How do the molecules in a liquid behave

• do not move

• move away from each other

• move in place

• move around each other

Tags

NGSS.MS-PS1-4

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 slower, substance will be a solid

• molecules will move slower, substance will be a liquid

• molecules will move faster, substance will be a liquid

• molecules will move faster, substance will be a gas

Tags

NGSS.MS-PS1-4

If you transfer energy into a substance how will the molecules change?

• molecules will move faster

• molecules will move slower

• molecules will stop moving

Tags

NGSS.MS-PS1-4

If you transfer energy out of a substance how will the movement of the molecules change?

• molecules will move faster

• molecules will move slower

• molecules will stop moving

• molecules do not move

Tags

NGSS.MS-PS1-4

Will a phase change always occur when you transfer energy into or out of substance?

• Yes

• No

Tags

NGSS.MS-PS1-4

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 weaker attraction will change to a gas

• the substance with the stronger attraction will turn to a solid

• the substance with the stronger attraction will turn to a gas

• the substance with the weaker attraction will turn to a solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

You leave a glass of cold water on the table in the morning. When you come home after school the glass of water is warm. what happened to the water molecules while you were at school?

• the molecules moved closer together

• the molecules started moving faster

• then water lost cold molecules

• the molecules became larger

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

You have a substance in a jar. In the beginning the molecules move around each other. Later the molecules are moving away from each other. What happened to the substance?

• Before the substance was a gas. Later it was a liquid.

• Before the substance was a solid. Later it was a liquid.

• Before the substance was a liquid. Later it was a solid.

• Before the substance was a liquid. Later it was a gas.

Tags

NGSS.MS-PS1-4