Question

CBSE class 7 geography ch water notes if don't know then no need to answer


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Answer 1

Explanation:

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Answer 2

Answer:

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Explanation:

I. Answer the following:

1. List out the various sources of fresh water.

Ans. The major sources of fresh water are the rivers, ponds, springs and glaciers.

2. Why is the ocean water salty?

Ans. The water of the oceans is salty or saline as it contains large amount of dissolved salts. Most of the

salt is sodium chloride.

3. Which factors affect the movement of ocean water?

Ans. The factors that affect the movement of ocean water include

• Wind

• Ocean currents- warm and cold

• The gravitational pull of the sun and moon.

4. What is ocean current? Differentiate between warm and cold currents.

Ans.

• Ocean currents are streams of water flowing constantly on the ocean surface in definite

directions.

• The warm ocean currents originate near the equator and move towards the poles.

• The cold currents carry water from polar or higher latitudes to tropical or lower latitudes.

5. Write a short note on Tides.

• The rhythmic rise and fall of ocean water twice in a day is called a tide.

• There are two types of tides - high tide and low tide.

• It is high tide when water covers much of the shore by rising to its highest level.

• It is low tide when water falls to its lowest level and recedes from the shore.

• The strong gravitational pull exerted by the sun and the moon on the earth’s surface causes the

tides.

Practice question

6. What do you understand by water cycle? Draw a diagram to explain the same.

Refer page 30.

take practice question as bonus

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