NCERT Solutions for Class 7 Geography Chapter 5 Water Social Science
Here on this page you will get NCERT Solutions for Class 7 Geography Chapter 5 Water will help you find the answers to the questions you've been struggling to solve. These NCERT Solutions will provide you with adequate time to research and work on their assignments. Our experts have tried to make the solutions as easy as possible thus, you will not find any concept difficult to understand.
Chapter 5 Water NCERT Solutions for Class 7 Geography
1. Answer the following questions.
(i) What is precipitation?
Solution
Precipitation is a type of rain, sleet, snow, or hail that falls from clouds and accumulates on the ground.
(ii) What is water cycle?
Solution
The process by which water continually changes its form and circulates between oceans, atmosphere and land is known as the water cycle.
(iii) What are the factors affecting the height of the waves?
Solution
Factors affecting the height of the waves:
(i) Speed off wind
(ii) Duration of wind
(iii) Distance the wind blows over water
(iv) Which factors affect the movement of ocean water?
Solution
Factors affecting the movement of ocean water:
(i) Temperature
(ii) Earthquake or volcanic eruption
(iii) Gravitational pull of the sun and the moon
(iv) Underwater landslides
(v) What are tides and how are they caused?
Solution
Tides are the rhythmic rise and fall of ocean water that occur twice in a day. The strong gravitational pull exerted by the sun and the moon on the earth’s surface causes the tides.
(vi) What are ocean currents?
Solution
Ocean currents are streams of water flowing constantly on the ocean surface in definite directions.
2. Give reasons.
(i) Ocean water is salty.
Solution
The water of the oceans is salty as it contains large amount of dissolved salts.
(ii) The quality of water is deterioting.
Solution
The quality of water is deterioting because we get it from polluted water sources. These water bodies are getting polluted due to dumping of untreated wastes, sewage, pesticides, toxicor decayed materials into it.
3. Tick the correct answer.
(i) The process by which water continually changes its form and circulates between oceans, atmosphere and land
(a) Water cycle
(b) Tides
(c) Ocean currents
Solution (a) Water cycle
(ii) Generally the warm ocean currents originate near
(a) Poles
(b) Equator
(c) None of these
Solution (b) Equator
(iii) The rhythmic rise and fall of ocean water twice in a day is called
(a) Tide
(b) Ocean current
(c) Wave
Solution (a) Tide
4. Match the following.
(i) Caspian Sea | (a) Largest lake |
(ii) Tide | (b) Periodic rise and fall of water |
(iii) Tsunami | (c) Strong seismic waves |
(iv) Ocean currents | (d) Streams of water moving along definite paths |
- | (e) Water cycle |
Solution
(i) Caspian Sea | (a) Largest lake |
(ii) Tide | (b) Periodic rise and fall of water |
(iii) Tsunami | (c) Strong seismic waves |
(iv) Ocean currents | (d) Streams of water moving along definite paths |
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