Vineet was feeling very thirsty so he took out some ice cubes to add into water and forgot to keep the ice tray back. After sometime, when he came back he saw all the ice present in tray has changed into water. He got confused and asked his teacher to explain the reason behind it.
(a) Does water exist in any other form?
(b) What happens to ice when kept at room temperature?
(c) What values you observed in Vineet?

5

(a)

Water is one of our most precious commodities and no life can survive without it It has been predicted that water scarcity will become the subject of "Wars"in the near future. Write any two ways in which water is getting polluted. Write any two measures to stop water pollution at your level

5

(a)

Explain the process of cloud formation with the help of diagram.

5

(a)

Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens.

5

(a)

Draw a diagram to show how sea water reaches a lake or pond?

5

(a)

Dissolve two spoons of common salt in half a cup of water. Now, if you want to get the salt back, what will you do?

5

(a)

State different uses of water

5

(a)

Explain the process of rooftop rain water harvesting with the help of a suitable diagram.

5

(a)