Phase Change Basics

What is a phase change?

• When matter changes from one state to another

• When matter gains energy (heat)

• When solids change to liquids

Tags

NGSS.MS-PS1-4

Which of the following are examples of phase changes. Check all that apply.

• condensation

• liquid

• gas

• vaporization

• melting

Tags

NGSS.MS-PS1-4

Solid, liquid, & gas are 3 examples of what?

• phase changes

• states of matter

Tags

NGSS.MS-PS1-4

Which direction on the graph shows an INCREASE in heat energy?

• left

• right

Tags

NGSS.MS-PS1-4

Which direction on the graph shows a DECREASE in heat energy (cooling down)?

• left

• right

Tags

NGSS.MS-PS1-4

This model is missing arrows to show molecule movement. Which molecules should have the longest arrows?

• solid molecules

• liquid molecules

• gas molecules

Tags

NGSS.MS-PS1-4

Which molecules should have the smallest arrows because they move the least amount?

• solid molecules

• liquid molecules

• gas molecules

Tags

NGSS.MS-PS1-4

What makes a substance change from one state to another?

• Adding heat energy

• Removing heat energy

• Adding or removing heat energy

Tags

NGSS.MS-PS1-4

Check the boxes of all the phase changes that occur due to ADDING heat energy (getting warmer).

• melting

• sublimation

• condensation

• deposition

• vaporization

Tags

NGSS.MS-PS1-4

Check the boxes of all the phase changes that occur due to REMOVING heat energy (cooling down).

• freezing

• sublimation

• condensation

• deposition

• vaporization

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5