NCERT Class 7 Geography Chapter 3 Our Changing Earth Extra Questions and Answers
Class 7 Geography Chapter 3 Extra Questions and Answers – Our Changing Earth. Here in this Page Class VII Students can Learn Extra Questions & Answer 3rd Chapter Geography fully Inside.
We Provided Here Our Changing Earth Geography Chapter 3 Long Answer Type Question, MCQ Questions & Answer, Short Answer Type Questions (2 or 3 marks), and Very Short answer Type Question (1 marks).
Class 7 Geography Chapter 3 Extra Question with Answer – Our Changing Earth
Geography Chapter 3 Our Changing Earth Class 7 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
MCQ Type Extra Questions
(1) Ox bow lakes found in :
(a) Glaciers
(b) River Valleys
(c) Deserts
(d) Sea coast
Ans:- (b) River Valleys
(2) Which is not an erosional features of sea waves ?
(a) Cliff
(b) Beach
(c) Sea Cave
(d) Stacks
Ans:- (b) Beach
(3) Which agent of gradation forms Musroom rocks
(a) River
(b) Sea Waves
(c) Wind
(d) Glacier
Ans:- (c) Wind
(4) Which is a result of diastrophic forces ?
(a) Earthquakes
(b) Volcanoes
(c) Landslides
(d) Mountain building
Ans:- (d) Mountain building
(5) The Lithospheric plate move because of _______
(a) the molten magma inside the earth moves
(b) the earthquake
(c) the eruption of volcanoes
(d) the formation of rocks
Ans: (a) the molten magma inside the earth moves
(6) The landforms are a result of
(a) Endogenic forces
(b) Exodogenic forces
(c) Both 1 and 2
(d) none of the above
Ans:- (c) Both 1 and 2
(7) Loess is found in
(a) Plains
(b) Plateaus
(c) Mountains
(d) Deserts
Ans:- (d) Deserts
(8) Earthquake is measured with machine called
(a) Telegraph
(b) Compass
(c) Lactometer
(d) Seismograph
Ans: – (d) Seismograph
(9) The highest waterfall of the world is ________
(a) Victoria Falls
(b) Niagara Falls
(c) Angel Falls
(d) Jog Falls
Ans – (c) Angel Falls
Very Short Answer Type Extra Questions
(1) Define Volcano.
Solution:
A volcano is a vent (opening) in the earth’s crust that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
(2) Define Waterfall
Solution:
When the river tumbles at steeps angle over very hard rocks or down a steep vally side it forms a waterfall
In case you are missed :- Previous Chapter Extra Questions
(3) Define Loess
Solution:
When the grains of sand are very fine and light, the wind can carry it over very long distances . when such sand deposited in large areas, it is called loess.
(4) Define moraines
Solution:
The materials carried by the glacier as rocks big and small, Sand silt gets deposited. These deposits form glacial moraines.
5.) What is glacier?
Solution:
A slowly moving mass of ice in the mountainous region is called glacier.
(6) Indentify the scale on which magnitude of the earthquake is measured.
Solution:
Richter scale.
7.) What is mushroom rock?
Ans: The mushroom shaped rocks found in the desert are called mushroom rocks.
(8) Name the two process by which the landscape is continuously worn away.
Solution:
Weathering and erosion.
9.) What is the force that acts on the surface of the earth is called?
Ans: The force that acts on the surface of the earth is called exogenic force.
(10) Which is the highest waterfall in the world ?
Solution:
The highest waterfall in the world is Angel Falls of Venezuela in South America.
11.) What is the force that acts in the interior of the earth called?
Solution:
Endogenic force
Long answer Type Extra Questions
(4) Suggest some safety measures one should take during and after the earthquake.
Solution:
During an Earthquake – *Sage Spot – Under a kitchen counter, table or desk, against an inside corner or wall. *Stay Away from – Fire places, areas around chimney, Windows that shatter including mirrors and pictures frames. *Be Prepared – Spread awareness amongst your friends your friends and family member and face any disaster confidently. After an Earthquake- * Check water, gas, and electric lines for damage. If any are damaged, shut of the valves. * Stay away from damaged areas. *If you’re at school or work, follow the emergency plan or the instructions of the person in charge.
(5) Sea water continuously strike at the rocks and its formation its formation keeps changing. Comment.
Solution:
The erosion deposition of the sea waves gives rise to coastal landforms. Seawaves continuously strike at the rocks. Crake develop. Over time they become larger and wider. Thus, hollow like caves on the rocks. They are called sea caves. As these cavities become bigger and bigger only the roof the caves remain, thus forming sea arches. Further, erosion breaks the roof and only walls are left. These wall like features are called stacks. The steep rocky coast rising almost vertically above sea water is called sea cliff. The sea waves deposit sediments along the shores forming beaches.
Source: Diksha
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