Class 11 Geography Chapter 6 Geomorphic Processes

Class 11 Geography Chapter 6 Geomorphic Processes The answer to each chapter is provided in the list so that you can easily browse throughout different chapters SCERT Class 11 Geography Chapter 6 Geomorphic Processes and select need one.

Class 11 Geography Chapter 6 Geomorphic Processes

Join Telegram channel

Follow us:

Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. These solutions are part of SCERT All Subject Solutions. Here we have given Assam Board/NCERT Class 11 Geography Chapter 6 Geomorphic Processes Solutions for All Subject, You can practice these here…

Geomorphic Processes

Chapter: 6

PART-1

GEOGRAPHY

TEXTUAL QUESTION & ANSWER

(a) Multiple choice questions.

Q.1. Which one of the following processes is a gradational process? 

(i) Deposition 

(ii) Diastrophism

(iii) Volcanism

(iv) Erosion

Ans: (iv) Erosion

Q.2. Which one of the following materials is affected by the hydration process? 

(i) Granite

(ii) Clay 

(iii) Quartz 

(iv) Salts

Ans: (ii) Clay 

Q.3. Debris avalanche can be included in the category of-

(i) Landslides 

(ii) Slow flow mass movement

(iii) Rapid flow mass movement

(iv) Subsidence.

Ans: (iii) Rapid flow mass movement

(b) Answer the following questions in about 30 words.

Q.1. It is weathering that is responsible for biodiversity on the earth. How? 

Ans: Different parts of the earth’s surface have different intensities of weathering as a result as bio- diversity occurs. So, we may call it weathering that is responsible for biodiversity on the earth.

Q.2. What are mass movements that are real rapid and perceptible? List.

Ans: Mass movements are those movements involving transfer of mass rock debris down the slopes under the direct influence of gravity. The movements of mass mat range from slow to rapid.

Real rapid and perceptible movements are:

(a) Earth flow

(b) Mud flow 

(d) Avalanche

Q.3. What are the various mobile and mighty exogenic geomorphic agents and what is the prime job they perform? 

Ans: The various mobile and mighty exogenic geomorphic agents are:

(a) Flowing or running water

(b) Glaciers

(c) Wind.

They worked in their respective areas over the surface of the earth, i.e. running water is the most dominant exogenic agent in the wet and humid areas, in cold regions glaciers are the main geomorphic agent while in arid and semi-arid areas wind is dominant agent.

The prime Jobs that they perform are: (a) Wearing down the relief

(b) Transportation

(c) Filling up of basins or depressions on the earth’s surface.

Q.4. Is weathering essential as a prerequisite in the formation of soils? Why? 

Ans: Soil formation depends first on weathering. It is this weathering mantle which is the basic input for soil to form. The weathered materials are deposited somewhere. In course of time the weathered materials turn into soils. That is why, weathering is essential as a prerequisite in the formation of soils.

(c) Answer the following questions 150 words.

Q.1. “Our earth is a play field for two opposing groups of geomorphic processes” Discuss.

Ans: Our earth is a play field for two opposing groups of geomorphic processes. We know that the crust of the earth is dynamic, it moves vertically and horizontally from time to time. The earth’s surface is being continuously subjected to by external forces originating within the earth’s atmosphere and by internal forces from within the earth. The external forces are known as exogenic forces and the internal forces are known as endogenic forces. The action of exogenic forces results in wearing down of relief and filling up depressions of the earth’s surface. The other forces i.e, the endogenic forces continuously build up parts of the earth’s surface and hence the exogenic processes fail to even out the relief variations of the surface of the earth thus in this way our earth become the play field for exogenic and endogenic forces, i.e. to opposing groups of geomorphic processes.

Q.2. Exogenic geomorphic processes derive their ultimate energy from the sun’s heat. Explain.

Ans: The relief features of the earth’s surface is changed by the various geomorphic processes. As there are different climatic regions on the earth’s surface the exogenic geomorphic processes vary from region to region. Temperature and precipitation are two important climatic elements that control various processes.

On the basis of the intensity of the sun’s heat, we have found different geomorphic processes in different parts of the earth’s surface. 

In those areas over the surface of the earth, the temperature as well as amount of rainfall is high, the main geomorphic agent is the running water. On the other hand, in those areas, where the amount of temperature is high but no rainfall in such situations, winds are the main agent of surface transformation.

Again, there are many areas over the surface of the earth where neither temperature nor rainfall is the dominant process.

Besides these on the basis of the sun’s heat, the weathering, mass movement erosion and deposition activities vary from region to region. After all, the exogenic geomorphic processes derive their ultimate energy from the sun’s heat.

Q.3. Are physical and chemical weathering processes independent of each other? If not why? Explain with examples.

Ans: weathering is defined as mechanical disintegration and chemical decomposition of rocks through the actions of various elements of weather and climate. Physical weathering and chemical weathering processes are not independent of each other. But both depend on some applied forces.

In case of physical weathering processes Temperature and precipitation are most essential without these two no physical weathering can possible. On the other hand chemical weathering processes are found in various processes such as carbonation, hydration, oxidation and solution. In all these processes sun’s light i.e. air,. Water and temperature are essential. In absence of these no chemical weathering processes are possible. So, we may say that physical and chemical weathering processes are not independent of each other.

Q.4. How do you distinguish between the process of soil formation and soil- forming factors? What is the role of climate and biological activity as two important control factors in the formation of soils?

Ans: Process of soil formation: Soil formation depends first on weathering. The weathered material deposited somewhere. In course of time these are colonized by bacteria, other organisms, minor grasses and ferns may grow. By this way, the weathered material turns into soil i.e. the soil formation process is over. But the soil forming factors are different from the process of soil formation Soil forming factors: 

The main soil forming factors are: 1. Parent material.

2. Topography

3. Climate

4. Biological activity 

5. Time

The role of climate and biological activity in the formation of soils are as follows: 

(a) Climate: Climate is an important active factor in soil formation, Precipitation and temperature are the two notable climatic elements directly involved in soil formation. On the basis of the variation of these two elements soils vary from region to region. In more temperature and high rainfall areas are generally found loamy or clayey or alluvial soils on the other hand high temperature but low rainfall areas we obviously found dry or sandy soils.

(b) Biological activity: Biological activity is also another important factor of soil formation. Vegetation cover and also at later stages help in adding organic matter moisture retention and nitrogen. It also provides humus to soil.

Dev Kirtonia

Hi, I’m Dev Kirtonia, Founder & CEO of Dev Library. A website that provides all SCERT, NCERT 3 to 12, and BA, B.com, B.Sc, and Computer Science with Post Graduate Notes & Suggestions, Novel, eBooks, Biography, Quotes, Study Materials, and more.