NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals
Here you will find NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals will improve your awareness skills sharply and you can easily memorize more things precisely. Given Class 8 Science NCERT Solutions are available in understandable language and encourage students to learn new topics. It will let you explore answers of those questions which you're finding difficult to solve.
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NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals
These Chapter 7 Class 8 Science NCERT Solutions are curated by the experts in a comprehensive which can be helpful in clearing your doubts instantly. It will make entire memorizing process effortless and entertaining. These Science NCERT Solutions are prepared as per the accordance of latest CBSE guidelines so you can score maximum marks.
| Study Material for Class 8 Science Chapter 7 Conservation of Plants and Animals |
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Exercise
1. Fill in the blanks:
(a) A place where animals are protected in their natural habitat is called a __ .
(b) Species found only in a particular area are known as ______.
(c) Migratory birds fly to far away places because of _____ changes.
Answer
(a) A place where animals are protected in their natural habitat is called a sanctuary.
(b) Species found only in a particular area are known as endemic.
(c) Migratory birds fly to far away places because of climatic changes.
2. Differentiate between the following.
(a) Wildlife sanctuary and biosphere reserve
Wildlife sanctuary
|
Biosphere reserve
|
| It is an area within which animals are protected from possible dangers such as hunting. Their habitat is also conserved in this area. | It is a large protected area constructed for the conservation of biodiversity. |
| It provides protection and suitable living conditions to wild animals. | It helps in the conservation of various life forms such as plants, animals, and micro-organisms. |
(b) Zoo and wildlife sanctuary
Zoo
|
Wild life
sanctuary
|
| Zoos are smaller places having some animals protected for the public view. | Wildlife Sanctuary are larger places having wild animals in their natural habitat |
| It is an artificial habitat. | It conserves the natural habitat of animals. |
| It provides protection only. | It provides protection and suitable living condition to wild animals. |
(c) Endangered and extinct species
Endangered species
|
Extinct species
|
| It is a population of species that is on the verge of becoming extinct. | It is a population of species that no longer exists. Hence, it is extinct. |
| Blue whale, tiger, leopard, etc. are examples of endangered species. | Dodo, passenger pigeon, etc. are examples of extinct species. |
(d) Flora and fauna
Flora
|
Fauna
|
| It refers to all living plants in a particular area. | It refers to all animals living in a particular area. |
| Sal, teak, mango, etc. form the flora of Pachmarhi biosphere reserve. | Leopard, wolf, wild dog, etc. form the fauna of Pachmarhi biosphere reserve. |
3. Discuss the effects of deforestation on the following.
(a) Wild animals: When forests are cut, the natural habitat of the animals is destroyed. Without the natural habitat the animals are left with no place to live and breed. As a result of this many animals are at the verge of extinction.
(b) Environment: Environment is adversely affected by deforestation as ecological balance is disturbed. Carbon dioxide is not absorbed by plants and it gets accumulated in the atmosphere to cause global warming which increases the temprature of earth and disturb water cycle.
(c) Villages (Ruaral Areas): Deforestation leads to soil erosion and results in flash floods. This hampers agricultural activities and thus disturbs the people in rural areas.
(d) Cities (Urban Areas): Deforestation in cities can increase the risk of many natural calamities such as floods and droughts in that area.
(e) Earth: The whole earth is full of various ecosystems which together make the biosphere. Deforestation disturbs the balance in the biosphere. It disturbs climatic patterns.
(f) The next generation: They will not be able to see wide variety of flora and fauna also not get clean and cool environment. They will have to breathe poisonous gas. Life would be very difficult for the next generation.
4. What will happen if:
(a) we go on cutting trees.
(b) the habitat of an animal is disturbed.
(c) the top layer of soil is exposed.
Answer
(a) If we go on cutting trees then:
→ Earth will loose its top fertile soil layer and get conevrted into desert.
→ The ecological balance will get disturbed and and floods and drought will become more frequent.
→ Wildlife will also be affected.
(b) The habitat of an animal provides it with necessities such as shelter, food, and protection. If the habitat of an animal is disturbed, then it will be forced to go to other places in search of food and shelter. The animal could get killed by other animals in this process.
(c) If the top layer of soil is exposed, then it will gradually expose the lower layer of soil, which is hard and rocky in nature. This type of soil is less fertile as it contains less humus. Continued soil erosion will make the land barren or infertile.
5. Answer in brief:
(a) Why should we conserve biodiversity?
Answer
We should conserve biodiversity because it is very important for all living organisms and for the environment. We should conserve biodiversity to save it from becoming extinct.
(b) Protected forests are also not completely safe for wild animals. Why?
(e) What is Red Data Book?
(b) Protected forests are also not completely safe for wild animals. Why?
Answer
Protected forests are not completely safe for wild animals because people who live near or adjacent to forests use resources from forests to fulfil their own requirements. In this process, wild animals are killed and sold for lucrative amounts of money.
(c) Some tribals depend on the jungle. How?
(c) Some tribals depend on the jungle. How?
Answer
Tribals gather food, fodder, and fallen branches of trees from forests. Hence, they depend on forests for their daily requirements.
(d) What are the causes and consequences of deforestation?
(d) What are the causes and consequences of deforestation?
Answer
The main cause of deforestation is growing urbanization and industrialization. Need for more land and resources have lead to the cutting down of forests.
Consequences of deforestation are as follows:
→ Soil erosion
→ Depletion of groundwater
→ Flash flood
→ Global warming
Consequences of deforestation are as follows:
→ Soil erosion
→ Depletion of groundwater
→ Flash flood
→ Global warming
(e) What is Red Data Book?
Answer
Red Data Book is a source book that maintains an international list of all endangered animal and plant species.
(f) What do you understand by the term migration?
(f) What do you understand by the term migration?
Answer
Migration refers to the movement of an organism or a group of organisms from its natural habitat to another place at a particular time every year.
6. In order to meet the ever-increasing demand in factories and for shelter, trees are being continually cut. Is it justified to cut trees for such projects? Discuss and prepare a brief report.
Answer
No. It is not at all justified to cut trees to meet the ever increasing demands of human population. Forests are the habitat of several organisms including wild animals. They provide us with good quality air as they give out O2 and absorb the harmful CO2 gas from the atmosphere. In the process, they prevent the excessive heating of the atmosphere. They prevent soil erosion and natural calamities such as floods and droughts. They increase the fertility of the soil and help conserve biodiversity. The cutting of forests to meet the demands of growing human population will lead to global warming, soil erosion, greenhouse effect, droughts, floods, and many more problems. The destruction of forests will disturb the balance of nature. Hence, forests must be conserved.
Answer
We can contribute to the maintenance of green wealth by taking following actions:
→ We can grow new plants in our locality.
→ Water them regularly and care of them.
→ The existing plants should be properly nourished.
→ Encouraging awareness among the people in the locality about the importance of growing trees.
8. Explain how deforestation leads to reduced rainfall.
Answer
Plants absorb water from the soil and evaporates it to form clouds. Deforestation leads to cutting down of trees. As a result less water is absorbed from the soil and it disturbs the water cycle. The formation of clouds become difficult which leads to reduced rainfall.
10. Why should paper be saved? Prepare a list of ways by which you can save paper.
Answer
Paper should be saved because it takes around seventeen full grown trees to make one tonne of paper. Trees, as we know, are important to maintain a balance of nature. Therefore, in order to save trees and prevent the impact of their loss on living organisms, we need to save paper.
Ways by which paper can be saved:
→ Collect used paper and recycle it.
→ Use both sides of a paper for writing.
→ Spread awareness about the importance of paper.
→ Use paper intelligently.
11. Complete the world puzzle.
Down
1. Species on the verge of extinction.
2. A book carrying information about endangered species.
5. Consequence of deforestation.
Across
1. Species which have vanished.
3. Species found only in a particular habitat.
4. Variety of plants, animals and microorganisms found in an area.
Answer
1. ENDANGERED
2. RED DATA BOOK
5. DESERTS
Across
1. EXTINCT
3. ENDEMIC
4. BIODIVERSITY
Go Back To NCERT Solutions for Class 8 Science
Chapter 7 Conservation of Plants and Animals Class 8 Science NCERT Solutions
Class 8 NCERT Solutions are helpful resources that can help you not only cover the entire syllabus but also provide in depth analysis of the topics. It will improve your awareness skills sharply and you can easily memorize more things precisely. Detailed explanation provided under each NCERT solutions will help in understanding the concepts better.
Class 8 Science Chapter 7 Conservation of Plants and Animals NCERT Questions and Answers - Topics
• Deforestation and Its Causes
• Consequences of Deforestation
• Conservation of Forest and Wildlife
• Biosphere Reserve
• Flora and Fauna
• Endemic Species
• Wildlife Sanctuary
• National Park
• Red Data Book
• Migration
• Recycling of Paper
• Reforestation
Chapter 7 Conservation of Plants and Animals NCERT Solutions for Class 8 Science - Notes
• Deforestation means clearing of forests and using that land for other purposes.
• Consequences of Deforestation
→ Deforestation increases the temperature and pollution level on the earth. It increases the level of carbon dioxide in the atmosphere.
→ Ground water level also gets lowered. Deforestation disturbs the balance in nature. If cutting of trees continues, rainfall and the fertility of the soil will decrease.
→ There will be increased chances of natural calamities such as floods and droughts. Plants need carbon dioxide for photosynthesis.
→ Fewer trees would mean that less carbon dioxide will be used up resulting in its increased amount in the atmosphere. This will lead to global warming as carbon dioxide traps the heat rays reflected by the earth.
→ The increase in temperature on the earth disturbs the water cycle and may reduce rainfall. This could cause droughts.
→ Deforestation is a major cause which leads to the change in soil properties. This soil has less humus and is less fertile. Gradually the fertile land gets converted into deserts. It is called desertification.
→ Deforestation also leads to a decrease in the water holding capacity of the soil. The other properties of the soil like nutrient content, texture, etc., also change because of deforestation.
• Biosphere is that part of the earth in which living organisms exist or which supports life.
• Biodiversity, refers to the variety of organisms existing on the earth, their interrelationships and their relationship with the environment.
• To protect our flora and fauna and their habitats, protected areas called wildlife sanctuaries, national parks and biosphere reserves have been earmarked.
• The biosphere reserves help to maintain the biodiversity and culture of that area. The Pachmarhi Biosphere Reserve consists of one national park named Satpura and two wildlife sanctuaries named Bori and Pachmarhi.
• The plants and animals found in a particular area are termed flora and fauna of that area. Sal, teak, mango, jamun, silver ferns, arjun, etc are the examples flora. Chinkara, blue bull, barking deer, cheetal, leopard, wild dog, wolf, etc. are examples of the fauna.
• Endemic species are those species of plants and animals which are found exclusively in a particular area. Bison, Indian giant squirrel and flying squirrel are endemic fauna.
• Wildlife Sanctuaries like reserve forests provide protection and suitable living conditions to wild animals.
• A national park reserve is large and diverse enough to protect whole set of ecosystem. For example, in Satpura National Park, rock shelters and rock paintings are also preserved along with flora and fauna.
• Animals whose numbers are diminishing to a level that they might face extinction are known as the endangered animals.
• An ecosystem is made of all the plants, animals and microorganisms in an area along with non-living components such as climate, soil, river deltas etc.
• Red Data Book is the source book which keeps a record of all the endangered animals and plants.
• Animals and birds also move from one place to other in search of food which is called migration. Migratory birds fly to far away areas every year during a particular time because of climatic changes.
• Paper can be recycled five to seven times for use. We should save, reuse used paper and recycle it.
• Reforestation is restocking of the destroyed forests by planting new trees.
Chapter 7 Conservation of Plants and Animals Class 8 Science Questions and Answers - MCQ Questions with answers
1. Biotic components of an ecosystem does not include :
a) Minerals
b) Mammals
c) Mosses
d) Microbes
► a) Minerals
2. Animals found in a particular area are named as:
a) Flora
b) Fauna
c) Anima
d) Zoo
► b) Fauna
3. Red data book provides information about:
a) exotic species
b) threatened species
c) endemic species
d) extinct species
► b) threatened species
4. Those species which existed on earth once but not found anywhere now:
a) disappeared species
b) distinct species
c) invisible species
d) extinct species
► d) extinct species
5. What is the main aim of conserving living organisms?
a) To increase the world's population of organisms
b) To prevent the extinction of endangered species
c) To help the students of botany and zoology
d) To help in ecotourism
► b) To prevent the extinction of endangered species
6. Threatened species does not include :
a) Vulnerable species
b) Endangered species
c) Rare species
d) Extinct species
► d) Extinct species
7. Which of the following species is extinct in the wild?
a) dinosaurs
b) white tiger
c) dodo
d) crocodiles
► c) dodo
8. The places where animals receive protection are called
a) Animal sanctuary
b) National Parks
c) Rock shelters
d) None of the above
► a) Animal sanctuary
9. Which of these animal projects protect endangered species?
a) Tiger
b) Elephant
c) Crocodile
d) All of the above
► d) All of the above
10. Species exclusive to a particular area of land is called:
a) eroded
b) endemic
c) exotic
d) threatened
► b) endemic
NCERT Textbook will provide you with a lot of interesting topics thus these NCERT Solutions for Class 8 Science Chapter 7 will be useful in understanding in depth concepts well. These NCERT Questions and Answers for Science help you in improving the marks in the examinations and have edge over your classmates. These are very much essential in steering students towards their goal.