8th Standard CBSE Syllabus & Materials
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CBSE 8th Social Science Theme B - The Rise of the Marathas - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme B - Reshaping India's Political Map - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme A - Natural Resources and Their Use - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Science Keeping Time with Skies - New Model Questions Papers Study Material - QB365 Set A
Published on: 21/10/2025
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Questions + Answers key
Take MCQ Science Test
1.
_________ species are those which are facing the dangers of extinction.
2.
Plants and animals of a particular area are known as the ________ and ________ of the area.
3.
________ refers to the variety of living organisms in a specific area.
4.
Pachmarhi is an example of ______________________
5.
Migratory birds fly to far away places because of _______________changes.
6.
What will happen, if the top layer of soil is exposed?
7.
Differentiate between Endangered and extinct species.
8.
'Variety of all forms of life found in a region' is known by a specific name, what is it?
9.
Name the part of earth that supports life.
10.
Is deforestation associated with global warming? Explain.
11.
In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to :
Soil erosion
Soil pollution
Soil conservation
Soil fertility.
12.
Migratory birds fly to far away areas during a particular time of a year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?
(i) Unavailability of food
(ii) Extreme weather conditions
(iii) Overcrowding
(iv) Lack of nesting areas
ii & iii
i & ii
i& iv
ii & iv
13.
Which of the following features is correct for a wildlife sanctuary?
It is an artificially created protected area for animals.
It is a protected area for threatened and endangered wild animals.
It is meant for conservation of only plant species
Capturing and poaching of animals is strictly prohibited here.
14.
Which one of the following statements is true about endemic species?
They are found exclusively in a specific habitat
Endemic species can never become endangered.
They are found only in zoos and botanical gardens.
They are not affected by the destruction of their habitat.
15.
The places meant for conservation of biodiversity in their natural habitat are
(i) Zoological garden
(ii) Wildlife sanctuary
(iii) Botanical garden
(iv) National park
i & ii;
ii & iii;
iii & iv
i & iv
16.
The animals which are exclusively found in a particular area only are called
extinct species
endemic species
rare species
migratory species
17.
What do black buck, elephant, python and golden cat together represent in a forest?
Fauna
Ecosystem
Flora
Species
18.
Which statement is incorrect about endangered species?
Their number has decreased drastically
They might become extinct in the near future
They pose a danger to other animals
Their natural habitat needs to be protected
19.
Snakes are killed in large numbers because
they are very poisonous
they kill rats
their skin is expensive
they damage the crops
20.
The Red Data Book keeps a record of all the
(i) endemic species
(ii) endangered plants
(iii) extinct species
(iv) endangered animals
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
21.
Plants of a particular area are collectively termed as fauna.
22.
There can be a wildlife sanctuary within a biosphere reserve.
23.
Protected forests are completely safe for wild animals.
24.
Soil erosion leads to loss of humus
25.
Global warming is rise in temperature due to N02
1.
( )
Endangered
2.
( )
Flora,fauna
3.
( )
Biodiversity
4.
( )
biosphere reserve
5.
( )
climatic
6.
Removal of the top layer of the soil exposes the lower, hard and rocky layers. This soil has less humus and is less fertile. Gradually, the fertile land gets converted into deserts. It is called desertification.
7.
| Endangered species | Extinct species |
| It is a population of species that is on the verge of becoming extinct, e.g. blue whale, tiger. | It is a population of species that no longer exists. Hence, it is extinct, e.g. dodo, dinosaurs. |
8.
Biodiversity.
9.
Biosphere is that part of the earth in which living organisms exist or which supports life.
10.
Trees (and other plants) use carbon dioxide gas from the atmosphere for the process of food making called 'photosynthesis'. When a lot of trees are cut down during deforestation, then lesser number of trees will be left. The lesser number of trees will use up less carbon dioxide due to which the amount of carbon dioxide in the atmosphere will increase. In this way, deforestation increases the level of carbon dioxide in the atmosphere.
Carbon dioxide gas traps the sun's heat rays reflected by the earth (causing greenhouse effect). Trapping of heat rays by carbon dioxide increases the temperature of earth's atmosphere. This will lead to global warming. The gradual increase in the overall temperature of earth's atmosphere due to greenhouse effect caused by the increased level of carbon dioxide in the atmosphere is called global warming.
11.
(a)
Soil erosion
12.
(b)
i & ii
13.
(d)
Capturing and poaching of animals is strictly prohibited here.
14.
(a)
They are found exclusively in a specific habitat
15.
(c)
iii & iv
16.
(b)
endemic species
17.
(a)
Fauna
18.
(c)
They pose a danger to other animals
19.
(c)
their skin is expensive
20.
(c)
(iii) and (iv)
21.
(b)
22.
(a)
23.
(b)
24.
(a)
25.
(b)
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