Phase Changes

Suppose you pour a glass of ice water and set it on the kitchen table. After a few minutes, the outside of the glass will be covered with drops of water. Why did this happen?

• Oxygen in the air cooled and condensed onto the cold glass.

• Water vapor in the air cooled and condensed onto the cold glass.

• Water vapor in the air cooled and evaporated onto the cold glass.

• Water seeped through pores in the glass.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A substance is able to flow freely within a container. What state of matter is the substance in?

• Liquid

• Gas

• Solid

• Plasma

What are the characteristics of a solid?

• Solids do not have a definite shape but have a definite volume

• Solids have a definite shape and no definite volume

• Solids do not have a definite shape and no definite volume

• Solids have a definite shape and definite volume

When heat is added to a liquid, what occurs?

• Liquid molecules begin to condense to form a solid.

• Liquid molecules are being slowed down to become a gas.

• Liquid molecules speed up and begin to spread out to become a gas.

• Liquid molecules begin to slow down to become a solid.

Tags

NGSS.MS-PS1-4

What happens to molecules as temperature and energy increase?

• Matter condenses

• Substances expand when heated

• Atoms become less active

• Phase change slows down

When heat energy and temperature are at their lowest, what state of matter is a substance in?

• Gas

• Vapor

• Solid

• Liquid

Tags

NGSS.MS-PS1-4

Between what two points is the most energy being added to the system

• A -B
• B-C
• C-D
• D-E

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

NGSS.MS-PS3-1

Which line segment demonstrates vaporization occurring?

• B-C
• C-D
• D-E
• E-F

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

At point temperature does this substance finish melting?

• B
• C
• D
• E

Tags

NGSS.MS-PS1-4

How long does it take this substance to change from a liquid to a gas?

• 1 minute
• 2 minutes
• 10 minutes
• 15 minutes

Tags

NGSS.MS-PS1-4