Cooling Changes Things

Cold freezes water, turns juice into ice pops, and hardens wax.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 31

Cooling means taking heat away. A refrigerator cools things, and a freezer makes them very cold.
Cooling can freeze things. Water left in the freezer turns into ice at 32 degrees Fahrenheit.
Pour juice into molds and freeze it, and you get ice pops!
Cooling can make melted things hard again, like melted chocolate or melted wax.
Your turn! Sort these changes: heating, or cooling?
Try it with a grown-up! Pour juice into an ice cube tray and freeze it. Check it every hour. When does it turn solid?

Georgia Standards of Excellence in Science:

S2P1.c — Provide evidence from observations to construct an explanation that some changes in matter caused by heating or cooling can be reversed and some changes are irreversible. (Changes in matter could include heating or freezing of water, baking a cake, boiling an egg.)