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Chapters
2: Locating Places on Earth
3: Movements of the Earth
4: Structure of the Earth
5: Rocks
6: Landforms of the Earth
7: Earthquakes
8: Volcanoes
▶ 9: Weathering and Denudation
10: Hydrosphere
11: Composition and Structure of Atmosphere
12: Insolation
13: Atmospheric Pressure and Winds
14: Humidity
15: Pollution-Types and Sources
16: Effects of Pollution
17: Pollution—Preventive Measures
18: Natural Regions of the World
*: Map Based Questions
![Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई chapter 9 - Weathering and Denudation - Shaalaa.com](/images/geography-english-class-9-icse_6:e1464ff004d844649e81e9e1e11e08a5.jpg "Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई chapter 9 - Weathering and Denudation")
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Solutions for Chapter 9: Weathering and Denudation
Below listed, you can find solutions for Chapter 9 of CISCE Rachna Sapra for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई.
Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई 9 Weathering and Denudation SOLVE AND SCORE [Pages 88 - 90]
Multiple Choice Questions (MCQs):
Which of the following is not an exogenic process?
Weathering
Erosion
Earthquake
Deposition
The breaking of rocks into small fragments is called ______.
Weathering
Erosion
Mass movement
Deposition
Which of the following factors affect the rate of weathering?
Temperature
Rainfall
Structure of the rock
All of these
Among the types of weathering mentioned below, the minerals present in the rock undergo changes in their chemical composition. Identify the type of weathering.
Exfoliation
Hydration
Granular weathering
Block disintegration
The weathered rock material called talus is an outcome of which type of weathering?
Exfoliation
Hydration
Granular weathering
Block disintegration
Rounded small and big boulders called tors are formed as a result of which type of weathering?
Exfoliation
Hydration
Granular weathering
Block disintegration
On his last visit to Rohtang pass, in Himachal Pradesh, Arun noticed large cracks in the boulders. The cracks have been formed as a result of which type of weathering?
Block weathering
Granular weathering
Exfoliation
Frost wedging
Which of the following is a pre-condition for chemical weathering to take place?
Water
Air
Both water and air
Neither water nor air
Which of the following is not a type of chemical weathering?
Oxidation
Solution
Talus
Hydration
Which of the following is not a part of karst topography?
Cave
Stalagmites
Meander
Stalactites
The term denudation means ‘laying bare.’ Which of the following processes form a part of denudation?
Weathering
Erosion
Mass movement
All of these
Which of the following landforms are formed by the river in the middle course?
Gorge
Ox-bow lake
Delta
Waterfall
Which of the following landforms, one is expected to see while travelling in the Northern Plains?
V-shaped Valley
I-shaped Valley
Meander
Waterfall
The rate of erosion is directly proportional to the velocity of the river. Erosion is the most prominent action of river in its ______.
Upper course
Middle course
Lower course
In all the three stages of the river
Barchans, Seif, Parabolic, are the types of ______.
Sand dunes
Caves
Deltas
Valleys
Which of the following is a landform formed by the wind?
Deflation hollow
Delta
Cliff
Gorge
Assertion-Reason Based Questions: Four options are given for each question. Choose the correct option for your answer.
Assertion (A): Weathering is a precondition for the formation of soil and regolith.
Reason (R): The loose rock material on the bedrock is called regolith.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): Block weathering commonly takes place in the deserts.
Reason (R): The daily range of temperature is low in the deserts.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): Karst topography is formed in the regions of limestone rocks.
Reason (R): Karst topography is formed as a result of physical weathering.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): Deposition is the main action which takes place in the upper course of the river.
Reason (R): The journey of the river in the mountains is called its upper course.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): The cut off meander is called the Ox-bow Lake.
Reason (R): The river forms the meanders in the middle course.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Source-based Questions:
Read the passage given below and answer the following questions.
| Weathering refers to the fragmentation of the rocks (but not its removal), either due to the mechanical disintegration or chemical decomposition. It is the first step of denudation and provides the base for the subsequent processes, namely, erosion and mass movements to take place. The chief agents of weathering are the weather elements such as temperature and precipitation. The rate of weathering in a region depends upon its climatic conditions. For example, in desert type of climate, where the variations in temperature are on daily basis in the form of high diurnal range of temperature, the rate of weathering is high. Similarly in moist climate, for example, the Equatorial type of climate, which is hot and humid, the rate of weathering is high. |
- What is the term used for the removal of the weathered rock particles?
- Why is it said that weathering provides the base for erosion and mass movement to take place?
- Which type of weathering takes place in the areas where the diurnal range of temperature is high?
Answer the following questions.
What is weathering?
Name the types of weathering.
Give the significance of weathering.
What are the effects of weathering?
Mention the three stages of the river. Name one landform associated with each stage.
Explain the process of formation of sand dunes.
How is weathering essential for the formation of soil?
Which landform is commonly formed as a result of exfoliation?
How is mass movement (wasting) different from erosion process?
Explain the process of formation of meanders in the middle course of the river.
Which landform is formed when a meander gets cut off from the river?
Define the term biological weathering.
Describe the work of plants as agents of weathering.
Define the following term:
Oxidation
Define the following term:
Denudation
Define the following term:
Exfoliation
Name the factors which control the rate of weathering.
Why is the rate of weathering higher in limestone in comparison to granite?
Explain the process of formation of waterfall.
Name the different types of chemical weathering.
Why does the sudden breaking of rock happen at night in the deserts?
Name the different types of physical weathering.
Name the different types of sand dunes.
How is the chemical weathering of hydration different from solution?
Name the features formed by the river at its mouth. Mention their importance.
What is the role of the plants in accelerating the biological weathering?
Mention the factors responsible for mechanical weathering.
What is the mass movement?
Give an example of mass movement.
How is block disintegration different from granular weathering?
Give an example of landform formed as a result of the process of deposition.
Explain the role of frost in weathering. In which type of region is it most common?
What are stalactites?
What are stalagmites?
What is the role of carbonation in weathering?
What is the role of human activities in weathering?
Solutions for 9: Weathering and Denudation
Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई chapter 9 - Weathering and Denudation
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