Balbharati solutions for Geography (Social Science) [English] 11 Standard chapter 2 - Weathering and Mass Wasting [Latest edition]

Study the diagram and answer the following questions:

1. Identify the types of rocks shown in the diagram.
2. Arrange the rocks according to their chronology of origin.
3. Explain how sedimentary rocks are formed.
4. Think of all the factors which may break the rocks into smaller pieces.
5. Which type of rock will break easily as compared to others? Why?

Can animals and plants also influence weathering? Will that be physical or chemical weathering? Which type of weathering does stone quarrying cause?

A region is having an annual mean temperature of 5°C and an annual rainfall of 1000 mm. Can you comment upon the weathering and the type with the help of the following questions? Discuss in class.

1. Which type of weathering will be dominant here?
2. Where will such a region be found?

In which regions will freeze-thaw weathering not be effective?

Besides climatic factors, rock type, and structure, can you think of some more factors that affect weathering?

Can tectonic forces be responsible for mass movements?

There is a shift of materials in mass movements as well as in transportation from one place to the other. So, why can’t both not be treated as one and the same?

See the diagram and answer the following questions:

1. Which rock layer has experienced the most weathering?
2. Which rock layer has experienced the least weathering?
3. What could be the reason behind the difference in weathering?

The satellite images are given in figure A and B belong to the same location but a different timeline. Study the images and answer the following questions.

                                    Figure A

                                  Figure B

1. Compare the images and tell what differences do you find in these images. 
2. In 2019 what does the patch of land going from north-west to south-east signify? Why was it not there in the 2011 image?
3. To what extent is the climate of the place responsible for this disaster?
4. Which other factors are responsible for the disaster?

Study the following schematic diagram. It shows the relationship between the speed of material and moisture content. Read the index, and answer the following questions:

1. Fast
2. Slow
3. Dry
4. Wet

1. Creep
2. Slide
3. Fall
4. Flow

Question:

1. What will happen when the weather conditions are dry?
2. When will a flow occur?
3. When will a creep occur?
4. Now can you enumerate the factors which affect mass wasting?

On the basis of the given points, differentiate between weathering and erosion.

Think of the reason why landslides should be more frequent in the foothill zone of the Himalayas and Western Ghat region. Why do landslides not occur in Marathwada in Maharashtra or the Maidan area in Karnataka?

Different types of materials flow down the slope. Types of mass wasting depend on their speed. Observe the pictures given in the figure. Match the explanation given below with the diagrams. Identify them as slow or rapid movements.

Types of mass Wasting

Complete the following flowchart.

Complete the chain:

Identify the correct correlation:

A: Assertion; R: Reasoning

A: In areas of high rainfall, slides are very common.

R: Types of mass wasting movements are dependent on a region's climate.

Identify the correct correlation:

A: Assertion; R: Reasoning

A: Gravity is a major factor in mass wasting.
R: Gravity pulls all things down to the earth's surface.

Identify the correct correlation:

A: Assertion; R: Reasoning

A: Freeze and thaw weathering is common in desert areas.
R: Water gets into cracks and breaks the rocks.

Identify the correct correlation:

A: Assertion; R: Reasoning

A: Surface water helps solifluction. 
R: Water table is responsible for the same.

Identify the correct group:

Give a geographical reason:

Temperature is the main factor behind granular weathering.

Give a geographical reason:

Human is an agent of weathering.

Give a geographical reason:

Slope is a major factor in mass wasting.

Give a geographical reason:

Oxidation changes the size and colour of the rocks.

Give a geographical reason:

Effect of mass movement will be greater along the western slope of the Sahyadri's than the eastern slope.

Write a short note on Gravity and Solifluction

Write a short note on Role of water in mass wasting

Write a short note on Exfoliation

Write a short note on Weathering and homogeneity in rocks.

Write a short note on Carbonation

Draw a neat and labelled diagram of Freeze and thaw weathering

Draw a neat and labelled diagram of Block disintegration.

Draw a neat and labelled diagram of Biological weathering.

Answer in detail:

Explain with examples the process of weathering happening in Konkan.

Answer in detail:

Explain the correlation between the Himalayas and mass movements. Give examples wherever necessary.