Water Changes State

Explain that temperature changes how water's particles move, in ice, water, and vapor.

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

What children learn in Level 49

Ice, liquid water, and water vapor are all the same particles, moving differently.
In ice, particles sit in rows and shake in place. Warm ice past 32 degrees Fahrenheit, and it melts. Now the particles slide past each other.
Keep heating. Particles move faster and escape into the air as water vapor, a gas you can't see. Water boils at 212 degrees Fahrenheit.
Cooling goes the other way. Vapor condenses into a liquid, and liquid freezes. It's all a physical change, because it's still water.

Georgia Standards of Excellence in Science:

S5P1.b — Construct an argument based on observations to support a claim that the physical changes in the state of water are due to temperature changes, which cause small particles that cannot be seen to move differently.