Summary
Shows how heating and cooling change matter between solid, liquid, and gas — melting, freezing, evaporating, and condensing.
Viewer safety
All ages
Gentle animated educational content, safe to show cold; still worth a quick preview to match it to your lesson.
Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Talk about it
Adding heat can melt a solid or boil a liquid; taking heat away can freeze a liquid or turn vapor back to drops. Many of these changes can be reversed.
- What happens to ice when it warms up?
- How could you turn liquid water into a solid?
- Which of these changes can be undone?
Quick work-a-long
Vocabulary: melt, freeze, evaporate, condense.
Try it: Watch an ice cube melt in your hand. Describe the change and how you could reverse it.