Cambridge Primary (1-6). Stage 5. Science. Learner's Book - Unit 3: States and properties of matter - Question 77

You will need: a glass or clear plastic bowl, a small dish which will fit inside the bowl, water, clear plastic wrap or a sheet of clear plastic and an elastic band, a small stone

- Place the dish inside the bowl.
- Pour some water into the bowl around the dish. The water should be about 1 cm deep. Make sure no water splashes into the dish.
- Put the plastic wrap over the bowl and stick it down. Or put the sheet of plastic over the bowl and hold it down with the elastic band.
- Put the small stone on the plastic. Leave the bowl outside in a warm, sunny place for a few hours.