3. A phase change is a change from one phase to another. What phase changes would you
see in this example?
Gizmo Warm-up
In the Phases of Water Gizmo, you can heat up or cool down a
beaker of water.
1. Press Heat to heat up the water. Wait until the temperature
stops rising and observe. What happens?
2. Why do you think the lid lifts up?
3. Now press Chill to remove thermal energy from the water. What happens now?