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. (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 of irrigation in the fields. (T/F)
(d) Rain is the ultimate source of water. (T/F)
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. (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 of irrigation in the fields. (T/F)
(d) Rain is the ultimate source of water. (T/F)
Explanation:
(a) True
(b) False
(c) False
(d) False
2. Explain how groundwater is recharged ?
2. Explain how groundwater is recharged ?
Explanation:
Groundwater is recharged by the various method such as rainwater, water sources coming from river,ponds, seeps through soil and fills all the empty spaces and cracks deep below the ground instantly.
3. There are ten tube wells in a lane of fifty houses. What could be the long-term impact on the water table?
3. There are ten tube wells in a lane of fifty houses. What could be the long-term impact on the water table?
Explanation:
If ten tube wells in a lane of fifty houses are situated, the groundwater will get used for domestic purposes. This results in the depletion of the groundwater level, and the water table goes down.
4. You have been asked to maintain a garden. How will you minimise the use of water?
4. You have been asked to maintain a garden. How will you minimise the use of water?
Explanation:
We minimise the use of water in various stages, I will use the technique of drop irrigation. In this method required amount of water is used to the roots of the plants using narrow pipes thus it can be preventing the loss of water.
5. Explain the factors responsible for the depletion of the water table ?
5. Explain the factors responsible for the depletion of the water table ?
Explanation:
Factors responsible for the depletion of water table are :-
(i) Increase the demand of water due to over population.
(ii) Deforestation leads to less rainfall which affect the recharge of river and ponds.
(iii) Lack of awareness in people about water managements.
6. 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 ________
6. 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 ________
Explanation:
(a) Tube wells and Hand pumps
(b) ice , water and vapour
(c) hydrosphere
(d) infilteration
7. 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
7. 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
Explanation:
Correct ans is (iii) Heavy Rainfall
8. 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.
8. 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.
Explanation:
The Correct ans is (ii) Under the ground remains constant.
9. Make a sketch showing the groundwater and water table. Label them.
9. Make a sketch showing the groundwater and water table. Label them.
Explanation:
Also Read: Water: A Precious Resource Class 7 Extra Questions
Also Read: Chapter 17: Forests – Our Lifeline Question Answers
