7th Geography Term 1 Unit 2 Book Back Solutions

Samacheer Kalvi 7th Geography Term 1 Unit 2 Social Book Back Question and Answers:

Samacheer Kalvi 7th Standard New Social Book Back 1 Mark and 2 Mark Question & Answers PDF uploaded and available below. Class 7 New Syllabus 2021 to 2022 Book Back Question & Answer solutions available for both English and Tamil Medium. Class 7 Geography Book Term 1 Unit 2 – Landforms Answers/Solutions are provided on this page. 7th Std Social Book is of 1st Term consists of 10 units, 2nd Term consists of 7 units and Term 3rd consists of 10 Units. All Units/Chapters of Term 1st, 2nd, 3rd Social Book Back One, and Two Mark Solutions are given below.

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Samacheer Kalvi 7th Social Book Back Unit 2 Term 1 Answers/Solutions Guide PDF:

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Geography – Term 1 Unit 2

Landforms

I. Choose the correct answer:

1. …………………… is a deposition of river sediments along the foot-hills.
a) Plung pool
b) Alluvial fan
c) Flood plain
d) Delta
Answer: b) Alluvial fan

2. Courtallam falls is located across the ………………………….river.
a) Cauvery
b) Pennar
c) Chittar
d) Vaigai
Answer: c) Chittar

3. The landform created by glacial deposition is …………..
a) Cirque
b) Arete
c) Moraine
d) Tam lake
Answer: c) Moraine

4. Large deposits of loess are found in …………..
a) the USA
b) India
c) China
d) Brazil
Answer: c) China

5. Landform which is not associated with wave erosion
a) Cliffs
b) Sea arch
c) Stacks
d) Beaches
Answer: d) Beaches

II. Fill in the blanks:

1. The process of breaking and crumbling of rocks is ………………………….
Answer: weathering

2. The place where the river joins a lake or a sea is known as ………………………….
Answer: River mouth

3. Inselbergs are found in the …………………………. desert in South Africa.
Answer: Kalahari

4. A cirque is known as ………………………….in Germany.
Answer: Kar

5. The longest beach in the world is ………………………….
Answer: Miami Beach in the U.S.A

III. Match the following:

1. Breaking and crumbling of rocks	a) Glacier
2. Abandoned meander loops	b) Barchans
3. Large body of moving ice	c) Lagoon
4. Crescent-shaped sand dunes	d) Weathering
5.Vembanad lake	e) Oxbow lake

Answer:

1. Breaking and crumbling of rocks	d) Weathering
2. Abandoned meander loops	e) Oxbow lake
3. Large body of moving ice	a) Glacier
4. Crescent-shaped sand dunes	b) Barchan
5.Vembanad lake	c) Lagoon

IV. Consider the following statement and tick (✓) the appropriate answer:

1. Assertion (A): The deltas are formed near the mouth of the river.
Reason (R): The velocity of the river becomes slow when it approaches the sea.
a) Both A and R are correct
b) A is correct and R is wrong
c) A is wrong and R is correct
d) Both A and R are wrong
Answer: a) Both A and R are correct

2. Assertion (A): Sea arches in turn become Sea Stacks.
Reason (R): Sea Stacks are the results of wave deposition,
a) Both A and R are correct
b) A is correct and R is wrong
c) A is wrong and R is correct
d) Both A and R are wrong
Answer: b) A is correct and R is wrong

V. Answer the following:

1. Define erosion.
Answer:
Erosion is the wearing away of the landscape by water, wind, ice and sea waves, etc.

2. What is a plunge pool?
Answer:
The plunge pool is a hollow feature at the base of a waterfall formed by cavitation.

3. How are Oxbow lakes formed?
Answer:
Due to continuous erosion and deposition, the meander loop cuts off from the river and forms a cut-off lake is called an Ox-bow lake.

4. Name the major landforms formed by glacial erosion.
Answer:
Mountain or valley Glacier, cirque, Tam Lake, Arets, TJ’ shaped Valley.

5. Give a note on Mushroom rocks.
Answer:
In deserts, the rocks in the shape of a mushroom are commonly called mushroom rocks.

6. What is a lagoon? Give an example.
Answer:

A lagoon is a shallow stretch of water partially or completely separated from the sea.
Ex: Chilkalake, Pulikat lake, and Vembad lake.

VI. Distinguish the following:

1. Tributary and Distributary
Answer:
Tributary: A Stream or river that flows into and joins the main river.

Distributary: A stream that branches off and flows away from the mainstream.

2. ‘V’ shaped valley and ‘U’ shaped valley
Answer:
‘V’ Shaped Valley

Formed by the river erosion.
The landscape creates a steep-sided valley like the letter ‘V’ is ‘V’ shaped valley.

‘U’Shaped Valley:

formed by Glacier erosion.
The landscape deepened and widened by the lateral and vertical erosion is like a letter TJ’ is TJ1 shaped valley.

3. Continental glacier and Mountain glacier
Answer:
Continental Glacier:

The Glacier covering vast areas of a continent with thick ice sheets.
Ex: Antarctica, Greenland

Mountain Glacier:

Mountain Glacier is a stream of ice flowing along a valley and bounded by steep sides.
Ex: The Himalayas and the Alps

VII. Give Reason:

1. The ends of the meander loops come closer and closer.
Answer:
Due to continuous erosion and deposition of rivers along the sides of the meander, the ends of the meander loop comes closer and closer.

2. Flood plains are very fertile.
Answer:

As the river floods, it deposits layers of fine soil and other materials called sediments along its banks.
This leads to the formation of a flat fertile flood plain. So the flood plains are very fertile.

3. Sea caves are turned into stacks.
Answer:
As the cavities of sea caves become bigger, only the roof of the caves remains to form sea Arches. When erosion further breaks the roof, only walls are left, thus forming stacks.