Suggest one traditional way of storing water from ancient time.

2

(a)

The earth looks blue from space. Explain why?

2

(a)

Reservoir of dam helps us to manage water. How?

2

(a)

The excessive use of water leads to a severe problem. Write the problem.

2

(a)

 How much of the earth's surface is covered with water?

2

(a)

Mention the source of groundwater.

2

(a)

From where do the workers get water for construction?

2

(a)

As our population increases, we need more water for drinking, washing and other purposes. Does this affect the water table? Explain.

2

(a)

The substance W is necessary for the normal growth and development of all types of plants and animals. An acute scarcity of substance W has an ill effect on plants which can hinder the natural process X in plants causing a severe shortage of Y leading to famine. It may also lead the shortage of Z which is essential for breathing and respiration. What could W, X, Y and Z be?

2

(a)

Why is water called a unique substance?

2

(a)

What is the effect of water scarcity on plants?

2

(a)

What do you mean by rainwater harvesting?

2

(a)

Why is water so important for us?

2

(a)

What is underground water? How is it obtained?

2

(a)

A list of jumbled words are given here. Write the correct form of each word.
(a) Washferret
(b) Charrege
(c) Quifera
(d) Wosn.

2

(a)