Class 9 Social Science MCQ Chapter 6 Change of the Earth’s Surface, Class 9 Social Science MCQ Question Answer, Class 9 Social Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Social Science Class 9 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 9 Social Science MCQ Chapter 6 Change of the Earth’s Surface Question Answer can be of great value to excel in the examination.
SCERT Class 9 Social Science MCQ Chapter 6 Change of the Earth’s Surface
SCERT Class 9 Social Science MCQ Chapter 6 Change of the Earth’s Surface Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 9 Social Science MCQ Chapter 6 Change of the Earth’s Surface provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.
Change of the Earth’s Surface
Chapter – 6
Multiple Choice Questions & Answers
1. Which of the following is an exogenous factor that cause change to the earth’s surface?
(d) None of these.
Ans: (a) Sunray.
2. Which of the following is an endogenic factor that cause change to the earth’s surface?
Ans: (d) earthquake.
3. Which of the following is not an activity of river?
Ans: (d) creation.
4. Which of the following is an exogenic of river?
Ans: (a) erosion.
5. Meandering course of river can be seen in___
(d) river mouth.
Ans: (b) plain.
6. When does the river form horse-shoe lake?
(a) in highland.
(b) in river mouth.
(c) in plains.
(d) in its source.
Ans: (c) in plains.
7. What is the bed of river through which it flows called?
(c) River valley.
(d) alluvial plain.
Ans: (c) River valley.
8. On which river’s bank can natural levee be seen in India?
Ans: (c) Brahmaputra.
9. The others name of flood plain is____
(c) alluvial plain.
(d) last plain.
Ans: (c) alluvial plain.
10. Where do glacier occur?
(a) equatorial region.
(b) polar region.
(c) Meditarian region.
(d) low land.
Ans: (b) Polar region.
11. Which is a landform produced by wave erosion?
Ans: (a) beach.
12. Which is not a wind related haphazard?
Ams: (d) flood.
13. Which one is not a land form produced by wind deposition?
Ans: (d) delta.
14. Where does the erosional work of a river is more evident?
(a) In source.
(b) In mouth
(c) in basin.
(d) in the channel.
And. (d) in the channel.
15. Where are deltas formed?
(a) In highlands.
(b) in the source of river.
(c) in the mouth of the river.
(d) in the valley.
Ans: (c) in the mouth of the river.
16. Natural forces which act upon the earth’s surface externally are known as____
(a) Natural forces.
(b) exogenic factors.
(c) endogenic factors.
(d) Natural factors.
Ans: (b) exogenic factors.
17. Which one is not an exogenic factor?
(c) Volcanic eruption.
Ans: (c) Volcanic eruption.
18. What percentage of earth’s surface is covered by hydrosphere?
Ans: (a) 71%.
19. Which is an endogenic factor?
(b) volcanical eruption.
(d) Sea waves.
Ans: (b) Volcanic eruption.
20. In how many ways do rivers carry sediments?
Ans: (b) three.
21. Rivers do not carry their sediments in
(a) dissolved state.
(b) Suspended state.
(c) Rolling state.
(d) Mixed state.
Ans: (d) Mixed state.
Very Short Answer Type Questions:
1. What is tributary?
Ans: A tributary is small stream or river that joins a main body of river.
2. What is meant by bed load of a river?
Ans: A river carries tiny particles of sand, mud and silt during its movement. These materials get deposited on the river bed which are known as bed load of the river.
3. What are Perennial rivers?
Ans: Perennial rivers are those which contain water throughout the whole year.
4. What are non-perennial or seasonal rivers?
Ans: Some rivers which dry up during dry season are called seasonal or non-perennial rivers.
5. What is the other name of flood plain?
Ans: Alluvial plain.
6. In India where the natural levee can be seen?
Ans: On the banks of the Brahmaputra natural levee can be seen.
7. What are the main activities of a river?
Ans: The main activities of a river are erosion, transportation and deposition respectively.
8. Name some wind related haphzards.
Ans: Some of the wind related haphazards are hurricane, typhoons and tornadoes.
9. On what factors the shape and size of sand dunes depend?
Ans: The sand dunes vary in their shapes and size depending on the nature of wind, its directions and velocity.
10. Name two landforms of wind erosion.
Ans: Yardangs and Inselberg are two land forms of wind erosion.
11. Name two land forms created by wind deposition.
Ans: Ridges and sanddunes.
12. What is meant by Abrasion?
Ans: Abrasion is the process of erosion by wind where the wind drives sand and dust particles against an exposed rock.
13. What are Yardangs?
Ans: Yardangs are the land forms composed of ridges and grooves. These are the results of wind erosion over relatively soft sedimentary rocks.
14. Where are Yardangs found?
Ans: Yardangs are found in Atacama desert, Chile and Central Asia.
15. What is a glacier?
Ans: A glacier is a slow-moving ice which comes down from the slope of the mountain.
16. Name two landforms of glacial deposition.
Ans: Two landforms of glacial deposition are moraine and drumlin.
17. Where does glacier occur?
Ans: Glacier occurs in polar regions and in high altitude of mountain.
18. Mention two characteristics of iceberg.
Ans: (i) Icebergs are made up of fresh water.
(ii) Ice bergs are dangerous in shipping.
19. What is meant by coast?
Ans: Coasts are the land margins of the ocean.
20. What is wave length?
Ans: Wave length is the horizontal distance between one peak of a wave and the next.
21. How are beaches formed?
Ans: Beaches are formed by sea waves. They are deposits containing gravel, pebbles or sand laid down by waves.
22. What is Tsunami?
Ans: The earth movement in the sea floor produces devastating waves on the sea are called tsunami.
23. What is the total length of the coast line in the world?
Ans: The total length of the coast line in the world is about of 5 million kms.
1. Indicate the nature of work done by river in its upper course.
Ans: In the upper course, as the river has a steep slope it flows down with high velocity. Main tributaries join the river in the upper course. The main work of the river in this course is erosion. It gives rise to watersand, river capture, gorge, canyons, waterfalls etc.
2. Give two reasons why all rivers do not form deltas.
Ans: All the rivers do not form deltas for the following reasons:
(i) If the mountain course is short and swift there will be particularly no load in river to form delta.
(ii) If the coast at mouth of the river is rocky, very deep or washed by strong ocean currents it will not enable the river to form delta.
3. What are the main features of glacial movement?
Ans: The main features of glacial movement are:
(i) Glaciers move very slowly unlike river.
(ii) The velocity of glacial movement is maximum in the middle portion and minimum along the margins.
(iii) The movement of glaciers is affected by varying thickness of the glacier, presence of salt water, the topography of the ground on which the glacier is moving.
4. What are the methods of wind erosion?
Ans: Wind erosion may be of three types:
(i) Deflation: This involves lifting and flouring away loose materials, after exploitation and weathering from the ground resulting in formation of large depression called deflation follows Oases may be formed in this manner e.g. the Qattara Depression of the Shore, 500 m. below the sea level.
(ii) Abrasion: The wind derives sand and dust particles against an exposed rock. This is sand blasting.
(iii) Attrition: When the sand blown particles roll down against one another or they are in collision they become rounded and smaller in size.
5. What is a beach? State its importance.
Ans: A plain like feature is found to develop in the sea shore where continuous wave action causes systematic sand deposits. This type of feature with gentle sea ward slope formed mainly of sand is called beach. The combined effects of Swash and Backwash over the sea shore result in such features. The sand particles in such beaches may very from fine sands to small pebbles. The beaches in the coastal areas attract people for recreation.