Ncert solutions science class 7 Solutions for Chapter 16 water a precious resource

Water cycle does not involve which of the following?

The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. (T/F)

Water shortage is a problem faced only by people living in rural areas. (T/F)

Rain is the ultimate source of water. (T/F)

People obtain groundwater through tube wells and _______.

Three forms of water are ice, water and ________.

The water bearing layer of the earth is _______.

The process of water seepage into the ground is called _______.

Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly

Which of the following is a way to use water economically?

Which of the following does not show water shortage?

Which of the following are not the liquid forms of water?

(i) Snow

(ii) Lake water

(iii) River water

(iv) Water vapour

(v) Ice

Choose the correct combination from the options below.

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

On which of the following day is World Water Day observed?

“Every Drop Counts” is a slogan related to

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

State whether the following statement is True or False:

Water vapour is the gaseous form of water.

State whether the following statement is True or False:

Ice is solid whereas snow is the semi-solid form of water.

State whether the following statement is True or False:

Ocean water cannot be used for domestic purposes.

State whether the following statement is True or False:

Rapid growth of industries is one of the causes for water shortage.

A man digging the ground near a water body found that the soil was moist. As he kept digging deeper and deeper he reached a level where all the spaces between particles of soil and gaps between rocks were filled with water. The upper limit of this layer is called

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. (T/F)

(b) Water shortage is a problem faced only by people living in rural areas. (T/F)

(c) Water from rivers is the only source for irrigation in the fields. (T/F)

(d) Rain is the ultimate source of water. (T/F)

Explain how animals dwelling in the forest help it grow and regenerate.

Q1) Exercise

1. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) The freshwater stored in the ground is much more than that

present in the rivers and lakes of the world.

(b) Water shortage is a problem faced only by people living in rural

areas.

(c) Water from rivers is the only source of irrigation in the fields.

(d) Rain is the ultimate source of water.

Explain how groundwater is recharged?

Q2) Explain how groundwater is recharged?

There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?

Q3) There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?

Q4) You have been asked to maintain a garden. How will you minimize the use of water?

You have been asked to maintain a garden. How will you minimise the use of water?

Q5) Explain the factors responsible for the depletion of the water table.

Explain the factors responsible for the depletion of water table.

Q6) Fill in the blanks with the appropriate answers:

(a) People obtain groundwater through _______ and _______.

(b) Three forms of water are ____, _____, and ______.

(c) The water-bearing layer of the earth is an _______.

(d) The process of water seepage into the ground is called ________.

Fill in the blanks with the appropriate answers:

(a) People obtain groundwater through____ and ________.

(b) Three forms of water are ________, ________ and ________.

(c) The water bearing layer of the earth is ________.

(d) The process of water seepage into the ground is called ________.

Q7) Which one of the following is not responsible for water shortage?

(i) The rapid growth of industries

(ii) Increasing population

(iii) Heavy rainfall

(iv) Mismanagement of water resources

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

(i) Rapid growth of industries

(ii) Increasing population

(iii) Heavy rainfall

(iv) Mismanagement of water resources

Choose the correct option.

The total water

(i) in the lakes and rivers of the world remains constant.

(ii) under the ground remains constant.

(iii) in the seas and oceans of the world remains constant.

(iv) of the world remains constant.

Q8) Choose the correct option. The total water

(i) in the lakes and rivers of the world remains constant.

(ii) under the ground remains constant.

(iii) in the seas and oceans of the world remains constant.

(iv) of the world remains constant.

Q9) Make a sketch showing groundwater and water table. Label it.

Make a sketch showing groundwater and water table. Label it