8th Standard CBSE Syllabus & Materials
8th Standard CBSE
CBSE 8th Social Science Theme D - Factors of Production - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Social Science Theme C - Universal Franchise and India's Electoral System - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Social Science Theme B - The Rise of the Marathas - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Social Science Theme B - Reshaping India's Political Map - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Social Science Theme A - Natural Resources and Their Use - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Science Keeping Time with Skies - New Model Questions Papers Study Material - QB365 Set A

Published on: 21/10/2025
Download CBSE Class 8th Standard CBSE 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 8th Standard CBSE Science
Questions + Answers key
Take MCQ Science Test

1.
Pachmarhi is an example of ______________________
2.
_______________traps the heat of sun rays
3.
Migratory birds fly to far away places because of _______________changes.
4.
Species found only in a particular area is known as _________________
5.
A place where animals are protected in their natural habitat is called _____________________
6.
Why do migratory birds migrate from one place to another?
7.
What are National Parks?
8.
What is the function of Biosphere reserve?
9.
What is ecosystem?
10.
Why are small animals much more in danger of becoming extinct than the bigger animals?
11.
Boojho wants to know whether tigers are still found in the forest He is excited to see a tiger.
12.
Paheli has heard that some of the endemic species may vanish. Is it true?
13.
Boojho is curious to know how deforestation reduces rainfall on the one hand and leads to floods on the other.
14.
Paheli is curious to know the purpose of making national parks, wildlife sanctuaries and biosphere reserves.
15.
Arrange the following in order to show how deforestation leads to water pollution.
I. The roots of the trees no longer have a firm grip on the soil.
II. Rainfalls onto the ground.
III. The trees of a forest are cut down
IV. The loose soil gets washed away into a nearby body of water.
16.
Name the part, built to support the biodiversity.
17.
Why is it important to conserve forests?
18.
Are tigers still found in Satpura Tiger Reserve?
19.
Mention what is considered as the answer to deforestation.
20.
Various products are obtained from forests for which they are cut. Name some important products which we get from forests.
21.
What do you mean by protected area? Explain it with examples.
22.
Is deforestation associated with global warming? Explain.
23.
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.
24.
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.
25.
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
26.
The animals which are exclusively found in a particular area only are called
extinct species
endemic species
rare species
migratory species
27.
What do black buck, elephant, python and golden cat together represent in a forest?
Fauna
Ecosystem
Flora
Species
28.
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
29.
Snakes are killed in large numbers because
they are very poisonous
they kill rats
their skin is expensive
they damage the crops
30.
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)
31.
Deforestation increases the level of one of the following the atmosphere.
Ozone
Carbon dioxide
Oxygen
Water vapour
32.
The place of living of an organism in environment is called
home
resort
habitat
reservoir
33.
Which one of the following changes may occur due to desertification?
Decrease in atmospheric temperature
Increase in water holding capacity of soil
Increased chances of floods
Conversion of fertile land into a desert
34.
The Siberian crane comes to India every year in winter for a few months.
To escape the severe summer
To escape the severe winter
To escape the heavy rains
To escape from predators
35.
Which one of the following statements is true about a biosphere reserve?
It is a protected area where only endemic species live
It is meant only for the conservation of plants and animals
It is meant to conserve both, the biodiversity and the culture of that area
there are no other protected areas within its limits
36.
Planting new trees is called
species
deforestation
desertification
reforestation
37.
Wild buffalo is an endangered species because
its population is diminishing
it has become extinct
it is found exclusively in a particular area
its poaching is strictly prohibited
38.
Dinosaurs are the extinct animals
39.
A sourcebook which keeps the record of all the endangered animals and plants is called Red Data Book.
40.
Pachmarhi biosphere reserve consists of one national park and two wildlife sanctuaries
41.
Bison is an endemic fauna of Pachmarhi biosphere reserve.
42.
Deforestation leads to an increase in the water holding capacity of the soil.
1.
( )
biosphere reserve
2.
( )
carbon dioxide
3.
( )
climatic
4.
( )
endemic species
5.
( )
wildlife sanctuary
6.
The migratory birds migrate from an area and fly far away to a specific area every year during a particular time because of climatic changes.
7.
The areas that are reserved for the wildlife, where they can freely use the habitats and natural resources are called National Parks.
8.
The Biosphere reserves help to maintain the biodiversity and culture of that area. One biosphere reserve may also contain other protected areas in it.
9.
An ecosystem constitutes the plants, animals and micro-organisms in an area along with nonliving components such as climate, soil, river deltas etc.
10.
At times, we kill snakes, frogs, lizards, bats and owls ruthlessly without realising their importance in the ecosystem. By killing them we are harming ourselves. They might be small in size but they play a significant role in the formation of food chains and food webs.
11.
Tiger is one of the many species which are slowly disappearing from our forests. But, the Satpura tiger reserve is unique in the sense that a significant increase in the population of tiger has been seen here.
12.
Yes, the destruction of habitat, increasing population and introduction of new species may affect the natural habitat of endemic species and endanger their existence.
13.
Deforestation leads to global warming which increases the temperature of earth and this increase in temperature disturbs the water cycle and reduces rainfall. Deforestation also leads to a decrease in water holding capacity of soil and movement of water from the soil surface into the ground, which causes floods.
14.
To conserve and preserve the animals and plants whose number are diminishing and are facing extinction, national parks, wild life sanctuaries and biosphere reserves are established.
15.
III. The trees of a forest are cut down.
I. The roots of the trees no longer have a firm grip on the soil
II. Rainfalls onto the ground.
IV. The loose soil gets washed away into a nearby body of water.
16.
Biosphere reserve supports the biodiversity.
17.
Forest conservation maintains the balance in nature. It acts as carbon sinks absorbing CO2 and keeps global warming at bay.
18.
Yes, tigers are still found is Satpura Tiger Reserve. Infact, there is a significant increase in their population over there.
19.
The answer to deforestation is reforestation
20.
Five products which we get from forests are fruits, vegetables, timber, medicines and fodder.
21.
Protected area is the area where our flora and fauna and their habitats are protected. They are called sanctuaries, national parks and biosphere reserves. Plantation, cultivation, grazing, felling trees hunting and poaching are prohibited there.
Sanctuary : Areas where animals are protected from any disturbance to them and their habitat.
National parks : Areas reserved for wildlife where they can freely use the habitats and natural resources.
Biosphere Reserves: Large areas of protected land for conservation of wild-life, plant and animal resources and traditional life of the tribals living in the area.
22.
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.
23.
(d)
Capturing and poaching of animals is strictly prohibited here.
24.
(a)
They are found exclusively in a specific habitat
25.
(c)
iii & iv
26.
(b)
endemic species
27.
(a)
Fauna
28.
(c)
They pose a danger to other animals
29.
(c)
their skin is expensive
30.
(c)
(iii) and (iv)
31.
(b)
Carbon dioxide
32.
(c)
habitat
33.
(d)
Conversion of fertile land into a desert
34.
(b)
To escape the severe winter
35.
(c)
It is meant to conserve both, the biodiversity and the culture of that area
36.
(d)
reforestation
37.
(a)
its population is diminishing
38.
(a)
39.
(a)
40.
(a)
41.
(a)
42.
(b)
8th Standard CBSE Syllabus & Materials
8th Standard CBSE
CBSE 8th Science Particulate Nature of Matter - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Science Pressure, Winds, Stroms and Cyclones - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Mathematics Quadrilaterals - New Model Questions Papers Study Material - QB365 Set A
NEW8th Standard CBSE
CBSE 8th Mathematics A story of Numbers - New Model Questions Papers Study Material - QB365 Set A
NCERT Books
Syllabus
Exam Pattern
Sample Question Papers
Previous year Question Papers
Important Notes
MCQ Practice test
NCERT Exemplers
Case study Questions
Image Based Questions
Passage based Questions
HOT Questions
Value Based Questions
Model Questions Papers
NCERT ( Book Back ) Questions
Assertion and Reason
Important Questions And Answers
CBSE 8th Standard CBSE Subjects
CBSE Standards