Observe and record
A reversible change can be undone, and the substance stays the same kind of material. Move through the stations and record what you see.
Q1. Record what happens at each station.
| Station | What I changed | What happened | Can it be undone? How? |
|---|---|---|---|
| Melting ice | |||
| Dissolving sugar | |||
| Melting chocolate |
Q2. At every station the substance stayed the same kind of material. Explain how you know the dissolved sugar is still sugar.
Q3. Why are all of these called reversible changes?
Q4. A candle is melted and then left to set hard again. Predict whether this is reversible, and explain.