{"id":17842,"date":"2021-02-04T15:51:21","date_gmt":"2021-02-04T10:21:21","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=17842"},"modified":"2022-03-02T11:13:44","modified_gmt":"2022-03-02T05:43:44","slug":"ncert-solutions-for-class-11-geography-chapter-6-part-a","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/ncert-solutions-for-class-11-geography-chapter-6-part-a\/","title":{"rendered":"NCERT Solutions for Class 11 Geography Chapter 6 Geomorphic Processes"},"content":{"rendered":"

Detailed, Step-by-Step NCERT Solutions for Class 11 Geography<\/a> Chapter 6 Geomorphic Processes Questions and Answers were solved by Expert Teachers as per NCERT (CBSE) Book guidelines covering each topic in chapter to ensure complete preparation.<\/p>\n

Geomorphic Processes NCERT Solutions for Class 11 Geography Chapter 6<\/h2>\n

Geomorphic Processes Questions and Answers <\/span>Class 11 Geography Chapter 6<\/h3>\n

Question 1.
\nMultiple choice questions :<\/p>\n

(i) Which one of the following processes is a gradational process?
\n(a) Deposition
\n(b) Diastrophism
\n(c) Volcanism
\n(d) Erosion
\nAnswer:
\n(d) Erosion.<\/p>\n

\"NCERT<\/p>\n

(ii) Which one of the following materials is affected by hydration process?
\n(a) Granite
\n(b) Clay
\n(c) Quartz
\n(d) Salts
\nAnswer:
\n(d) Salts.<\/p>\n

(iii) Debris avalanche can be included in the category of:
\n(\u0430) Landslide
\n(b) Slow flow mass movements
\n(c) Rapid flow mass movements
\n(d) Subsidence
\nAnswer:
\n(c) Rapid flow mass movements.<\/p>\n

Question 2.
\nAnswer the following questions in about 30 words :
\n(i) It is weathering that is responsible for bio-diversity on earth. How?
\nAnswer:
\nWeathering is an important exogenetic geomorphic process. It is the mechanical disintegration and chemical decomposition of rocks through the actions of various elements of weather and climate. Weathering processes are conditioned by many complex geological, climatic, topographic and vegetative factors.<\/p>\n

Biological weathering is contribution to or removal of minerals and ions from the weathering environment. Burrowing and wedging by organisms help in exposing the new surfaces to chemical attack and assist in the penetration of moisture and air. Decaying plant and animal matter helps in the production of humic matter.<\/p>\n

(ii) What are mass movements thsU are real rapid and *” perceptible? List.
\nAnswer:
\nMass movements involve the transfer of mass of rock debris down the slopes under the direct influence of gravity. The mass movements may range from slow to rapid, affecting shallow to deep column of materials and include creep, flow, slide and fall.<\/p>\n

\"NCERT<\/p>\n

(iii) What are the various mobile and mighty exogenic geomorphic agents and what is the prime job they perform?
\nAnswer:
\nWater, ice, wind, etc. are capable of acquiring and transporting earth materials. They are known as exogenetic geomorphic agents. When these natural agents become mobile due to gradients, they remove the materials and transport them over the, slopes. An agent is a mobile medium (like running water, moving ice masses, wind, etc.) which removes, transports and deposits earth materials. Running water, ground water, glaciers, wind waves and currents, etc. can be called geomorphic agents.<\/p>\n

(iv) Is weathering essential as a pre-requisite in the formation of soils? Why?
\nAnswer:
\nWhen rocks undergo weathering, some materials are removed through chemical or physical leaching by ground water and thereby the concentration of- remaining materials increases. Without such a weathering taking place, the concentration of the same valuable material may not be sufficient and economically viable to exploit, process and refine. Thus, weathering is essential.<\/p>\n

Question 3.
\nAnswer the following questions in about 150 words each :
\n(i) \u201cOur earth is a playfield for two opposing groups of geomorphic processes.\u201d Discuss.
\nAnswer:
\nThe endogenic and exogenic forces causing physical stresses and chemical actions on earth materials and bringing about changes in the configuration of the surface of the earth are known as geomorphic processes.<\/p>\n

Diastrophism and volcanism are endogenetic geomorphic processes. Weathering, mass wasting, erosion and deposition are exogenetie processes.<\/p>\n

The earth\u2019s surface is being continuously subjected to the external forces originating within the earth\u2019s atmosphere and the internal forces from within the earth, an it is ever-changing. The action of exogenetie ; forces result in wearing down (degradation) of relief\/elevations and filling up (aggradation) of basins\/depressions on the earth\u2019s surface.<\/p>\n

The endogenetic forces continuously elevate or build up parts of the earth\u2019s surface and \u2018hence\u2019 the exogenetie processes fail to even out l the relief variations of the surface of the earth. The building up and wearing down of the earth\u2019s surface by endogenetic and exogenetie forces respectively is going on from the time the earth\u2019s crust was 1 developed and enveloped by the atmosphere. Hence, our earth is a playfield of two opposing forces.<\/p>\n

\"NCERT<\/p>\n

(ii) Exogenic gemorphic processes derive their ultimate energy from sun\u2019s heat. Explain.
\nAnswer:
\nExogenic geomorphic processes vary from region to region. Temperature and precipitation are the two important climatic elements S that control various processes. All the exogenetie processes are covered under a general term\u00a0 denudation, which means to strip off or to uncover. Weathering, mass wasting\/movements, erosion and\u00a0 transportation are the type of denudation processes.<\/p>\n

Climatic factors being equal, the intensity of action of exogenetie geomorphic processes depends upon the type and structure of rocks.The density, type and distribution of vegetation, which largely depends upon precipitation and temperature, exert an indirect influence – on exogenetie geomorphic processes. Within different climatic regions, there may be local variations of the effects of different climatic elements due to altitudinal differences. For all exogenetie processes, the energy\/ heat is received from the sun. Hence, sun is the ultimate source of energy.<\/p>\n

(iii) Are physical and chemical weathering processes independent of each other? ]f not, why? Explain with examples.
\nAnswer:
\nChemical weathering processes: The weathering processes, viz, hydration reduction, oxidation, carbonation, solution act on the rocks to decompose, dissolve or reduce them to a fine clastic state through chemical reactions. Water and air. along with heat, must be present to speed up all chemical reactions.<\/p>\n

\"NCERT<\/p>\n

Physical weathering : Physical weathering depends on some applied forces:<\/p>\n