1. What happens when water is boiled?

2. Which factor increases the rate of evaporation?

3. What happens to the level of water when it is frozen into ice?

4. What do we call the process of water droplets joining to form rain?

5. What happens to water vapour when it touches a cold surface?

6. What happens to the humidity level when it rains?

7. Which of these materials absorbs water?

8. What is the main source of drinking water?

9. Why do we see fog in the winter?

10. How does water from the soil return to the atmosphere?