Which of the following activities does not involve use of water?

1

(a)

Washing clothes

(b)

Bathing

(c)

Cleaning utensils

(d)

Drying wet clothes

Transpiration is a process in which plants

1

(a)

receive water from soil

(b)

absorb water vapour from air

(c)

prepare food from water

(d)

release water in the form of water vapour

Which one is a process involving change of water into vapours in atmosphere?

1

(a)

Evaporation

(b)

Transpiration

(c)

Precipitation

(d)

Condensation

Which of these is a result of condensation of water vapours?

1

(a)

Rain

(b)

Snowfall

(c)

Hail

(d)

Tiny water droplets

Wells are fed by

1

(a)

pond water 

(b)

lake water

(c)

rainwater

(d)

groundwater

State for each of the following whether it is due to evaporation or condensation. Fog appearing in a cold winter morning.

1

(a)

Condensation

The rainwater can be used to ________ groundwater.

1

(a)

recharge

Water cycle helps in regulating the _____ on earth.

1

(a)

weather

Dew is found on leaves of grass on _________ .

1

(a)

winter mornings

In our country, most of the rainfall occurs during the ________ season.

1

(a)

monsoon

Water vapour enters into air through evaporation.

1

(a) False

(b) True

Circulation of water in the environment is known as water cycle.

1

(a) False

(b) True

We should conserve water for future.

1

(a) False

(b) True

Sunlight is essential to convert water into its vapours.

1

(a) False

(b) True

Pucca drains from the roadside allow water to go into the ground.

1

(a) True

(b) False

A process by which rainwater is made to percolated into the ground is used to conserve water. What is this process called?

2

(a)

Rainwater harvesting is done to conserve water but what is the main purpose of rainwater harvesting?

2

(a)

Human body also contains water. What is the percentage of water in human body?

2

(a)

How much water is required to produce each page of a book?

2

(a)

What happens if it does not rain for a long period?

2

(a)

Water kept in sunlight gets heat from the sun and is evaporated. But how does water kept under the shade of a tree also gets evaporated? Explain.

3

(a)

Why is there a need for conserving water? Give two reasons.

3

(a)

Animals like fish in shallow pond die in certain conditions. What are these conditions?

3

(a)

What makes the fresh rainwater become saline after reaching earth's surface?

3

(a)

Groundwater should be used judiciously. Why?

3

(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)