CBSE 7th Standard Science Water: A Precious Resource Important Questions And Answers Study Material - QB365 Set B | QB365

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CBSE 7th Standard Science Water: A Precious Resource Important Questions And Answers Study Material - QB365 Set B

Published on: 31/10/2025

Question Set B

CBSE 7th Standard Science Water: A Precious Resource Important Questions And Answers Study Material - QB365

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Std: 7th Standard CBSE - Science

chapter: Water: A Precious Resource - Important Questions And Answers

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Questions:

True or False

5 x 1 = 5

Plants wilt-and ultimately dry up if they are not watered for few days.

(a)

False

(b)

True

The process of seeping of water into ground is called filtration.

(a)

True

(b)

False

Ocean water cannot be used for domestic purposes.

(a)

False

(b)

True

Water vapour is the gaseous form of water.

(a)

False

(b)

True

The freshwater stored in the ground is much more than that present in the rivers and lakes of the world.

(a)

False

(b)

True

Generic 3

5 x 3 = 15

Give the main causes of water scarcity in our country.

Mention three causes of water scarcity in our country.

Explain how the traditional use of groundwater is different from the present use.

Explain the factors responsible for the depletion of water table.

10.

Explain how groundwater is recharged.

Fill up / 1 Marks

5 x 1 = 5

11.

Bawri was the traditional way of collecting_______________________

12.

Rainwater harvesting _____________ the water table

13.

The best way to overcome shortage of water is ____________________

14.

The process of water seepage into the ground is called________________

15.

People obtain groundwater through _________________________and ____________________

Multiple Choice Question

5 x 1 = 5

16.

Which of the following inhibits the seepage of rainwater into ground?

(a)

A pukka floor

(b)

Playground

(c)

Grass lawn

(d)

Forest land

17.

Renewable resources need to be conserved because

(a)

we should not use them faster than they are replenished by nature

(b)

they are slowly disappearing from the earth

(c)

if we overuse them, nature will stop replacing them

18.

Which one of the following is not responsible for water shortage?

(a)

Rapid growth of industries

(b)

Heavy rainfall

(c)

Increasing population

(d)

Management of water resources

19.

Water which falls from the clouds as rain or snow is called

(a)

condensation

(b)

precipitation

(c)

infiltration

(d)

transpiration

20.

Choose the correct option. The total water

(a)

in the lakes and rivers of the world remains constant

(b)

under the ground remains constant

(c)

in the seas and oceans of the world remains constant

(d)

of the world remains constant

Generic 2

5 x 2 = 10

21.

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?

22.

Water circulates through the water cycle in the three forms. Name them.

23.

Mention the source of groundwater.

24.

Mention the year which is celebrated as international year of freshwater?

25.

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

Generic 5

2 x 5 = 10

26.

Water is very precious for all the living beings. What will happen in future, if we do not save water now?

27.

Sachin lives in an area where on and off water scarcity is there. He gave a thought to the problem and planned to get a solution. He decided to harvest rainwater in his village. He made efforts to convince the people of his area, built some drainage system and water tanks where rainwater could be collected.
(a) Name few structures he might have built.
(b) Name the process of water cycle, Sachin will use for harvesting water.
(c) Write the methods, Sachin will tell the people to use water wisely

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Answers Key:

True or False

5 x 1 = 5

(a)
False

(b)
False

(a)
False

(a)
False

(a)
False

Generic 3

5 x 3 = 15

The main causes of water scarcity in our country are
(i) Rapid urbanisation.
(ii) Increased number of industries.
(iii) Population explosion.

The three causes of water scarcity in our country are
(i) Rapid urbanisation.
(ii) Increased number of industries.
(iii) Population explosion.

Traditionally in ancient times, people made bawris to collect rainwater in the old buildings. We still use these structures and are reviving them to harness rainwater

The factors responsible for depletion of water table are as follows:
(i) Increasing population It decreases the open area for seepage of water into the grounds,
(ii) Increasing industries Most of the stages of manufacturing processes in industries require water. If the number of industries increases, then the water required by them will also increase and will lead to the depletion of water table.
(iii) Agricultural activities The water for agriculture is mainly utilised from groundwater, rainwater and canal water. The increased population causes pressure on agricultural practices. This inturn causes increase the use of groundwater and leads to the depletion of water table.

10.

The groundwater is recharged in the following manner:
(i) Rainwater and the water from waterbodies on the earth surface pass through the soil by the process of infiltration.
(ii) The infiltrated water then gets accumulated in the aquifer deep under the ground.

Fill up / 1 Marks

5 x 1 = 5

11.

()
rainwater

12.

()
replenish

13.

()
conserve water

14.

()
infiltration

15.

()
tubewells and hand pumps

Multiple Choice Question

5 x 1 = 5

16.

(a)
A pukka floor

17.

(a)
we should not use them faster than they are replenished by nature

18.

Heavy rainfall is not responsible for water shortage, rather it increases water table.

19.

(b)
precipitation

20.

(d)
of the world remains constant

Generic 2

5 x 2 = 10

21.

W - Water, X - Photosynthesis
Y - Food, Z - Oxygen

22.

Water circulates through the water cycle in the three forms, i.e. solid, liquid and gas.

23.

Rainwater and water from the other sources like rivers, ponds, etc are the source of groundwater.

24.

The year 2003 was cetebrated as International year of freshwater.

25.

About two-third of the earth's surface is covered with water

Generic 5

2 x 5 = 10

26.

Water is needed for various life activities. If we continue the misuse of water and do not conserve it, the groundwater level will be depleted. This may result into various consequences like
(i) Lowering of the water table Excessive pumping can lower the groundwater table.
(ii) Reduced surface water supply Groundwater and surface water are connected. When groundwater is overused, the lakes, streams and rivers connected to groundwater, can also have little supply.
(iii) Loss of plants from land We fully depend on the plants for food directly or indirectly. Plants need water to prepare their food. If there will be scarcity of water on earth, the plants will be unable to prepare their food. This inturn will lead to the end of the life because world without plants means no food, no oxygen, not enough rain and other innumerable problems. Therefore, it is true that water is a precious resource

27.

(a) Sachin has build up cemented drainage channels in the elevated area and tanks where these channels will collect water.
(b) Sachin is planning to harvest rainwater.
(c) Sachin will educate people to use water judicially in the following way
(i) Use mug for brushing, shaving and bathing.
(ii) Water plants with drip irrigation.
(iii) Use and reuse water in home activities.