7th Standard CBSE Syllabus & Materials
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CBSE 7th Social Science Theme E - Understanding Market - New Sample Question Papers Study Material - QB365 Set A
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CBSE 7th Social Science Theme D - The Constitution of India- An Introduction - New Sample Question Papers Study Material - QB365 Set A
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CBSE 7th Social Science Theme D - From the Rulers to the Ruled : Types of Governments - New Sample Question Papers Study Material - QB365 Set A
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CBSE 7th Social Science Theme B - The Age of Reorganisation - New Sample Question Papers Study Material - QB365 Set A
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Published on: 09/09/2019
Our Changing Earth
Download CBSE Class 7th Standard CBSE Social Science question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 7th Standard CBSE Social Science
Questions + Answers key
Take MCQ Social Science Test
1.
The hill-like structures which are formed by the deposition of blowing wind in deserts are called
mushroom rocks
loess
oasis
sand dunes
2.
The steep rocky coast rising almost vertically above seawater is called
sea cliff
beaches
stack
sea caves
3.
What are the three types of earthquake waves?
A,B,C
X,Y,Z
P,S,L
P,Q,R
4.
Which is caused by the sudden movements of the Earth?
Earthquake
Folding
Floodplain
5.
Which is not an erosional feature of sea waves?
Cliff
Beach
Sea cave
6.
Waterfall
7.
Sand dunes
8.
Beach
9.
Meanders
10.
Glacier
11.
Differentiate between endogenic forces and exogenic forces.
12.
How an ox-bow lake is formed?
13.
What do you understand by earthquake? How can it be measured?
14.
What are ox-bow lakes?
15.
How are beaches formed?
16.
Solve the crossword puzzle with the help of given clues.
ACROSS
2. Loop like bend of a river.
4. Solid form of water.
7. Moving mass of ice.
9. Sudden descent of water in the bed of a river.
11. Natural cavity on weak rocks formed by action of waves.
12. Embankment on a river that keeps it in its channel.
13. Large body of sea water.
14. Dry area where sand dunes are found.
15. Small hill of sand caused by the action of the wind.
16. Flat plain formed by river deposits during time of flood.
DOWN
1. Rise and fall of water caused by friction of wind on water surface.
3. Flow of water in channel.
5. Steep perpendicular face of rock along sea coast.
6. Debris of boulder and coarse material carried by glacier.
8. Crescent shaped lake formed by meandering river.
10.Fine sand deposited by action of the wind.
13. Isolated mass of rising steep rock near a coastline.
14. Alluvial tracts of land formed by river deposits at the mouth of river.
17.
Discuss the erosional work of river.
18.
The greatest damage is usually closest to the______________ and the strength of the earthquake decreases away from the____________
19.
Sudden movements like_______________ and ____________cause mass destruction over the surface of the Earth.
20.
The_________________ inside the Earth moves in a circular manner.
21.
Large deposits of loess is found in_____________
22.
_____________and ______________of the sea waves gives rise to coastal landforms.
23.
Angel Falls in South America is the highest waterfall in the world.
24.
Place in the crust where the movement start is called epicentre.
25.
The Victoria Fall is located near South America.
26.
Wind is an active agent of erosion and deposition in the deserts.
27.
The Niagara Falls is located on border between Canada and USA in North America.
28.
State some commonly used earthquake prediction methods adopted by local people.
29.
How are glacial moraines formed?
30.
What are the different types of landforms found near or around sea?
31.
What do you understand by delta?
32.
In which continent, the Victoria fall is located?
1.
(d)
sand dunes
2.
(a)
sea cliff
3.
(c)
P,S,L
4.
(a)
Earthquake
5.
(b)
Beach
6.
( )
Rivers
7.
( )
Deserts
8.
( )
Sea shore
9.
( )
Deserts
10.
( )
River of ice
11.
Endogenic forces act in the interior of the Earth.
Exogenic forces act on the surface of the Earth.
12.
Due to continuous erosion and deposition along the sides of the meander, the ends of the meander loop come closer and closer. The meander loop cuts-off from the river in due course of time and forms a cut-off lake called an ox-bow lake.
13.
Earthquakes are the vibration of the Earth's surface caused by the movements of lithospheric plates. An earthquake is measured with a machine called a seismograph. The magnitude of the earthquake is measured on the Richter scale.
14.
An ox-bow lake is a cut-off lake formed due to cut-off of a meander loop.
15.
Beaches are formed by the deposition of sediments along the seashores through the sea waves.
16.
17.
The following points explain the work of river
(i) When the river tumbles at steep angle over very hard rocks or down a steep valley side it forms a waterfall.
(ii) As the river enters the plain, it twists and turns forming large bends known as meanders.
(iii) With the continuous erosion and deposition along the sides of the meander, the ends of the meander loop come very closer. Over time, the meander loop cuts-off from the river and forms an ox-bow lake.
(iv) At times the river overflows its banks deposited layers of fine soil and other material called sediments along its banks, and formed a flat-fertile floodplain.
(v) The raised banks are called levees.
(vi) As the river approaches the sea, its speed slows down and it forms a number of streams called distributaries.
(vii) The river then begins to deposit its load. Each distributary having its own mouth deposit its load of sediments and forms a delta.
18.
( )
epicentre, centre
19.
( )
earthquakes, volcanoes
20.
( )
molten magma
21.
( )
China
22.
( )
Erosion, deposition
23.
(a)
24.
(b)
25.
(b)
26.
(a)
27.
(a)
28.
( )
By studying animal behaviour local people can predict earthquake. For example, fish in the ponds get agitated snakes come to the surface, etc.
29.
( )
The material carried by the glacier such as big and small rocks, sand and silt gets deposited. These deposits form glacial moraines.
30.
( )
Sea caves, sea arches, stacks and sea cliff are the different types of landforms.
31.
( )
The collection of sediments from all the mouths of rivers form a delta. It is triangular shaped landmass.
32.
( )
The Victoria fall is located on the borders of Zambia and Zimbabwe in Africa.
7th Standard CBSE Syllabus & Materials
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CBSE 7th Standard CBSE Subjects
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