Balbharati solutions for Geography (Social Science) [English] 11 Standard chapter 3 - Agents of Erosion [Latest edition]

The names of many places may have some relation with the landforms located there. The names of a few of them are given below as examples. You are expected to find out the particular landforms to which they are associated. Find about them and try to locate them on a map using an atlas. Make a list of similar examples from India. Discuss your findings in the class.

Look at the figure below and answer the questions:

1. What features are formed in the upper course of the river? What processes will play an important role?
2. Can you mark the location where a waterfall may formed?
3. Why is there a change in slope from A to B? How will it influence the flow of the river?
4. Which human activities can be conducted in the region around A and B?
5. In which area will the process of deposition overtake erosion?
6. Alluvial fans and deltas are both features formed due to deposition but at different locations. Identify their regions of formation and the reason behind their different locations.

Look at the figure and identify the landforms at A, B, C, D, E, F, and G.

You have already learned about various landforms formed by the agents of erosion in Class IX. Identify the landforms given in the class IX textbook. Identify the agent which is responsible for their formation. Also, state whether they are erosional or depositional landforms. Complete the table accordingly in your notebook.

Have you ever been to a river and seen its bed? Discuss in the class about your observations about the river, its banks, its bed, and its velocity.

Find out famous examples of gorges and canyons.

In which diagram of the three will you find end moraines?

Study the figure given below and answer the following questions.

Questions:

1. Which rocks are mainly found here?
2. Identify the spot where the stream disappears.
3. Which major erosional process works in this area?
4. Identify the landforms formed by deposition.
5. Why do depositional landforms not form on the surface in areas of Karst terrain?

See the figure given below A, B, C. Answer the following questions.

Questions:

1. What differences do you find in the three figures?
2. Identify the landforms formed due to erosion by glaciers.
3. Where can U–shape valley be formed?
4. In which region will deposition start?
5. Identify the landforms formed by deposition by glaciers.

Complete the table:

Choose the correct option by identifying the correct correlation in the sentence:

Water or snow enters the cracks in the rocks and makes it weak. When the glacier passes on these rocks, it pulls the rocks at the bottom along with it. This process is called ________.

Choose the correct option by identifying the correct correlation in the sentence:

Sometimes, the river starts erosion upstream. This happens when the headstream gets a lot of water in the early stages of the river’s flow.

Choose the correct option by identifying the correct correlation in the sentence:

Soft rock erodes beneath the hard rock due to sea waves. This results into landforms which further develop as sea arches. The landform is ____________.

Choose the correct option by identifying the correct correlation in the sentence:

This landform develops due to the depositional work of wind. The windward slope of this landform is gentle.

Choose the correct option by identifying the correct correlation in the sentence:

River, glacier, wind, sea waves, and groundwater are the agents of erosion. The following work in the correct order is responsible to form various landforms.

Give a geographical reason:

The Eastern coast of India have deltas formed by the rivers but the Western coast has estuaries.

Give a geographical reason:

There is a direct relationship between the velocity of the agents and the process of deposition.

Give a geographical reason:

Compared to all the agents, sea waves work ceaselessly.

Give a geographical reason:

One finds many sheep rocks, horns, aretes, and hanging valleys in the Himalayas.

Give a geographical reason:

Karst landforms are seen concealed under the surface of the earth.

Give a geographical reason:

Snowline decides the limit of glacier work as an agent of erosion.

Write a short note on Attrition

Write a short note on the work of rivers in hilly areas and human activities.

Write a short note on Conditions necessary for work of wind.

Distinguish between the Attrition and Abrasion.

Distinguish between:

U shaped valley and V-shaped valley

Distinguish between:

Stalactite and stalagmite

Distinguish between Tributaries and distributaries.

Answer in detail:

Explain the landforms formed by different agents through the process of abrasion.

Answer in detail:

Explain how the depositional work done by river Ganga has been beneficial to human activities.

Answer in detail:

Which agents of erosion can you see on the cover page of the textbook? Which landforms can you see there? Write the process of the formation of anyone.

Draw a neat and labelled diagram for:

Deflation

Draw a neat and labelled diagram for:

Wave-cut platform

Draw a neat and labelled diagram for:

Mushroom rocks