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1.

What is a lagoon? Give an example.

Answer»

Lagoon is a shallow stretch of water partially or completely separated from the sea.

E.g. Chilka lake in Odisha, Pulicat lake in Tamil Nadu and Andhra Pradesh and Vembanad lake in Kerala are the famous lagoons in India.
Discussion
2.

Distinguish between Tributary and Distributary

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S.No.TributaryDistributary
1.A stream or river that flows into and joins a main river.A stream that branches off and flows away from a main stream.
2.Eg. Amaravathi is a tributary of river CauveryEg. Kollidam s a distributary of Cauvery.
Discussion
3.

Give a note on Mushroom rocks.

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In deserts rocks in the shape of a mushroom, commonly called mushroom rocks.
Discussion
4.

Define erosion.

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Erosion is the wearing away of the landscape by different agents like water, wind, ice and sea waves.
Discussion
5.

The ends of the meander loops come closer and closer.

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Due to continuous erosion and deposition of rivers along the sides of the meander, the ends of the meander loop comes closer and closer.
Discussion
6.

Distinguish between Continental glacier and Mountain glacier

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S.NoContinental glacierMountain glacier
1.Glacier covering vast areas of a continent with thick ice sheets is called continental glacier.Stream of ice flowing along a valley is called mountain glacier.
2.Eg. Antartica, Green landEg. The Himalayas, The Alps
Discussion
7.

Distinguish between ‘V’ shaped valley and ‘U’ shaped valley

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S.No.'V' shaped valley‘IP shaped valley
1Formed by erosion of riversFormed by lateral and vertical erosion of glaciers.
2Eg. Kambam valley in Tamil NaduEg. Leh Valley in Ladakh
Discussion
8.

Name the major landforms formed by glacial erosion.

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Cirque, Aretes, U’ Shaped Valley
Discussion
9.

How are Ox – bow lakes formed?

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Due to continuous erosion and deposition along the sides of the meander, the ends of the meander loop comes closer and closer. In due course of time the meander loop cuts off from the river and forms a cutoff lake, also called an Ox-bow lake.
Discussion
10.

What is a plunge pool?

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Plunge pool is a hollow feature at the base of a waterfall which is formed by cavitation.
Discussion
11.

Write a note on1. Sea Coast 2. Coast line

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1. Sea Coast: A part of the land adjoining or near the sea is called the Sea coast.

2. Coast line: The boundary of a coast, where land meets water is called the Coast line. The coastal areas are subject to change due to wave erosion and wave deposition
Discussion