Complete the sentences. 1 Water in the sea is salt water 2 Water in most lakes and rivers is 3 When the temperature is below 0°, water 4 When the temperature is above 0°, ice 5 When you 6 If you

1. Water in the sea is salt water and we can't drink it.
2. Water in most lakes and rivers is fresh water and we can drink it.
3. When the temperature is below 0°, water freezes.
4. When the temperature is above 0°, ice melts and turns into water.
5. When you heat water to 100°, it changes into steam.
6. If you cool steam, it changes back into water.

Answer: salt water, fresh water, freezes, melts, heat, cool