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Exercise (Forma ve Assessment)
A. Answer the following ques ons.
1. How is water important to us? What are the main causes of water pollu on?
2. What are the forms in which water exists on Earth?
3. Explain why we cannot drink sea water.
4. Explain the process of desalina on.
5. How is salt obtained?
B. Fill in the blanks using the help box. May I help you?
1. Water need to be _______ to make it safe to drink.
2. Plants need ___________ to make food. Water Salty Vapour
3. In evapora on, water changes to _______.
4. We cannot drink sea-water because it is ______.
5. _______ is the main source of water.
Puriļ¬ed Rain
C. Write T for true and F for false.
1. Life on Earth is not possible without water.
2. Plants need herbs to make food.
3. Water exists in the air as soil moisture.
4. Salty water can be made fresh through the process of desalina on.
5. Salt is obtained from fresh water.
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