CLASS6 DATE: 16.05.2020 CHAPTER 2. LANDFORMS EXERCISE WITH QUESTION ANSWERS AND MAP WORK.

1. TICK THE RIGHT OPTION {TO BE DONE IN BOOK} a. Aravallis. b. Intermontane plateau. c. Faulting. d. Deposition.

2. FILL IN THE BLANKS {TO BE DONE IN BOOK} a. Pointed. b. Minerals. c. Fault zone. d. Old fold.

3. Differentiate between: {TO BE DONE IN NOTEBOOK} a. Old Fold Mountain Young Fold Mountain These mountains have been subjected to the They are newly formed and having forces of denudation for a long geological heights higher than old fold mountain. period. They are much lower with rounded peaks They have pointed peaks, steeper and and gentle slopes. deeper slopes. Eg: Aravalli in India. Eg: The Himalayas in India. b. Rift Valley Block mountain The lowland mass remaining after the The uplifted land mass remaining after faulting are known as Rift valley. the faulting are known as Block mountains It is bordered by fault zones and separated Block mountains are steep sided and flat by land masses. topped. Eg: Great Rift Valley of Africa. Eg: Vindhyas in India. c. Erosional Plains Depositional Plains This type of plains are formed as result of It is formed as a result of deposition of erosion and weathering. sediments. These plains have been flattened by the These plains are made by depositing the erosion of soil and rocks away from a soil and rocks on a lower surface. higher feature. Eg:- Upper Mississippi valley of USA. Eg:- The Indo-Gangetic Plains in India. d. Intermontane Plateaus Piedmont Plateaus They are the highest and the most extensive They are relatively low rolling hills with type. an average heights. They are surrounded by mountains from all They are surrounded by mountain ranges the sides. on one side and bounded by plain or ocean by other sides. Eg:- The Tibetan Plateau. Eg:- The Malwa Plateau in India.

Q.4 Answer in brief: {TO BE DONE IN NOTEBOOK} a. How are fold mountains formed? Give two examples of fold mountains. a. The Mountains are formed due to the fold created by collision of two tectonic plates are known as Fold mountains. Eg :- The Himalaya (India), The Andes (South America). b. State two characteristics of block mountains. b. (i) Block mountains are steep sided and flat topped. (ii) Block mountains are characterized by massiveness steep, slopes and comparatively smooth topography. c. How are rift valleys formed? Give one example of rift valley. c. Rift valley is created due to a linear depression or trough created by the sinking of the intermediate crustal rocks between two or more parallel faults. It is also known as Graben. Eg:- Rhine Rift valley. d. Compare life in the mountains and in the plains. d. People living in mountainous areas have to face great environmental and economic difficulties. The difficulty of transport, shortage of level land and rigorous conditions of climate make the mountain regions thinly populated. Whereas in plain area the alluvial plains are the centers of great economic advancement because of the fine climate, fertile soil and facilities make the plains thickly populated. e. What type of mountain is Mt. Kilimanjaro? (e) Mt. Kilimanjaro is a volcanic type of mountain. f. Define structural plains. (f) Structural plains lie near the coasts which are formed as a result of emergence of sea bottom near coast.

5. Give reasons: {TO BE DONE IN NOTEBOOK} a. Young fold mountains have high peaks. a) Young fold mountains have high peaks because they have been subjected to denudation for comparatively short period only. b. Tibetan plateau is surrounded by mountains. b) This plateau and huge mountains were created respectively due to the tectonic pressure.

c. Rift valleys have steep sides. c) Rift valleys have steep sides because they are formed when the earth crust is divided, they are not like those valley which are formed by soil erosion.

Map work: {TO BE DONE IN NOTEBOOK} On the outline of world map, mark and label - World Mountains 1 Rockies, 2 Andes, 3 Appalachian, 4 Alps, 5 Himalayas, 6 Scandinavian Highlands ,7 Great Dividing Range , 8 Drakensberg, 9 Atlas Plateaus. 10 Canadian Shield, 11 Labrador Plateau, 12 Tibetan Plateau , 13 Brazilian Highland 14 African Rift Valley, 15 Patagonian Plateau.