Latest Updated : October 2023
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NCERT Solutions for Class 8 Science Chapter 5 Conservation of Plants and Animals will assist you in scoring more marks. This includes the textbook and their solutions for Conservation of Plants and Animals Chapter 5 of Class 8 Science, which is made in adherence to the updated syllabus 2023 released by CBSE.
Our solutions offer ample material to help students build a strong foundation and improve their understanding of the subject.
On this page, you will find all the NCERT Solutions for Class 8 Science Chapter 5 Conservation of Plants and Animals which includes detailed exercise-based solutions. These NCERT Solutions for Class 8 Science are downloadable and easy to access. Our Science experts have meticulously developed these solutions to support students in preparing for their Class 8 exams.
NCERT Solutions for Class 8 Science Chapter 5 Conservation of Plants and Animals
Coal and Petroleum Class 8 Science NCERT Textbook Questions
Exercise Questions
1.Fill in the Blanks.
(a) A place where animals are protected in their natural habitat is called ______________________.
(b) Species found only in a particular area is known as ________________.
(c) Migratory birds fly to far away places because of_________________ changes.
Solution:
(a) A place where animals are protected in their natural habitat is called Sanctuary.
(b) Species found only in a particular area is known as Endemic Species.
(c) Migratory birds fly to far away places because of climatic changes.
2. Differentiate between the following.
(a) Wildlife sanctuary and biosphere reserve
(b) Zoo and wildlife sanctuary
(c) Endangered and extinct species
(d) Flora and fauna
Solution:
(a) Wildlife sanctuary and biosphere reserve
| Wildlife Sanctuary | Biosphere Reserve |
| Wildlife sanctuary is the place where wild animals are protected from external dangers like hunting etc and their natural habitat is conserved. | It is a large area constructed for the conservation of biodiversity. |
| It provides protection and suitable living conditions for wild animals. Eg- Chilka Wildlife Sanctuary in Odisha. | It is used to conserve biodiversity like plants, animals and microorganisms. Ex- Nilgiri Biosphere reserve in Tamil Nadu |
(b) Zoo and wildlife sanctuary
| Zoo | Wildlife Sanctuary |
| In zoos animals are protected in artificial habitats and are kept for public exhibition. | Wildlife sanctuary is the place where wild animals are protected from external dangers like hunting etc and their natural habitat is conserved. |
| Animals kept in the zoo may or may not adapt to their artificial habitat, there will always be a risk of their survival. | Animals are kept in their natural habitat, so they usually dont have a problem with their surroundings. |
(c) Endangered and extinct species
| Endangered Species | Extinct Species |
| The species which are on the verge of extinction are called Endangered species. | The Species that no longer exist are known as extinct species. |
| Blue Whale, Leopard, Tiger are some examples. | Passenger pigeon, dodo etc are some examples. |
(d) Flora and fauna
| Flora | Fauna |
| The wide variety of plants that we find in a particular area is called flora. | The wide variety of animals that we find in a particular area is called fauna. |
| Bamboo, teak, rosewood, sal etc are found in Chilka Biosphere Reserve. | Blackbuck, Spotted Deer, Golden Jackals found in Chilka Biosphere Reserve. |
3. Discuss the effects of deforestation on the following.
(a) Wild animals
(b) Environment
(c) Villages (Rural areas)
(d) Cities (Urban areas)
(e) Earth
(f) The next generation
Solution:
(a) Wild animals : Deforestation leads to the destruction of the natural habitats of wild animals, due to this their population keeps on declining. It leads to loss of habitat of wild animals.
(b) Environment : Deforestation affect the environment badly due to disturbance of ecological balance. The amount of carbon dioxide is increased in the atmosphere and causes global warming. It also lowers the level of ground water and decreases the soil fertility and therefore increases the chances of natural calamities.
(c) Villages (Rural areas) : Villagers rely rainfall, soil fertility and other important factors which affect agricultural produce. Due to deforestation, the soil fertility decreases and in the case of water flow or a high-speed wind over the top layer of the soil, the soil particles get removed easily as there are no plants to hold them in place. This affects agriculture adversely and also the lives of villagers.
(d) Cities (Urban areas): Due to deforestation the chances of floods and other natural calamities have increased rapidly. Also since more trees are getting cut, global warming is also increasing which is causing a lot of pollution which makes it difficult for the people to survive in the cities and also causes a lot of diseases.
(e) Earth: Deforestation reduces the soil fertility and is affecting the soil quality adversely. This results in desertification, droughts and floods. Also the climate and other physical features of the earth are badly being affected due to deforestation.
(f) The next generation: The next generation will face problems in every step. Soil erosion, desertification, drought, global warming, floods, greenhouse effect and many other problems are caused only because of deforestation. They will lack a clean environment and many animals might also become extinct by then due to habitat loss.
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.
Solution:
(a) If we go on cutting trees then
– soil will loose its fertility and the toplayer of the earth will be converted into a desert.
– Many animals will loose their habitat.
-Ecological balance will be disturbed.
– Due ti increase in temperature, global warming will increase and will cause other natural calamities.
– Even water cycle will be affected adveresely due to this.
(b) If the habitat of an animal is disturbed then –
– Their natural habitat which provides them food, shelter and protection will get disturbed and in search of these things they might invade places meant for human living.
– Also many animals might be at the verge of becoming extinct or endangered.
(c) If the top layer of soil is exposed then –
– The exposed layer will loose its fertility and humus.
– Soil erosion on a continuous basis will turn land barren and infertile ultimately leading to desertification.
– Water retention capacity of the soil will also decrease.
5. Answer in brief.
(a) Why should we conserve biodiversity?
(b) Protected forests are also not completely safe for wild animals. Why?
(c) Some tribals depend on the jungle. How?
(d) What are the causes and consequences of deforestation?
(e) What is Red Data Book?
(f) What do you understand by the term migration?
Solution:
(a) Biodiversity refers to the variety or organisms existing on the earth. Their interrelationships and their relationship with the environment. It includes variety of plants, animals and microorganisms. Its important to conserve biodiversity to maintain the ecological balance of our earth.
(b) Protected forests are also not completely safe for wild animals because poachers continue to pose a significant threat to wildlife in protected forests and areas, making them unsafe for wild animals.
(c) Some tribals depend on the jungle for their general requirements like food, cloth, shelter and protection.
(d) Causes of deforestation are industrialisation, urbanisation, fulfilling ever increasing demands of human race like use of wood for fire, industries making different kind of materials, for paper etc.
Concequences of deforestation are as follow-
– soil looses its fertility and the toplayer of the earth might ead to the formation of a desert.
– Many animals loose their habitat.
-Ecological balance is disturbed.
– Global warming increases.
– Causes floods and droughts.
(e) The Red Data Book serves as both a record and a source of information for all endangered animals and plants.
(f) Periodical movement of a species of birds from their native place to other places due to changes in climate or for breeding is called migration.
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.
Solution:
No, its not justified to cut trees for the ever increasing demands of the human race. Cutting trees, might help us temporairily but it can have a long term consequence. Trees are very important for maintaining our earths balance. Deforestation will lead to soil infertility and the toplayer of the earth will be converted into a desert, many animals will loose their habitat and ultimately will become endangered or extinct. Our ecological balance will be disturbed. Cutting of trees will also lead to increased global warming and will cause other natural calamities as well. Even water cycle will be affected adveresely due to this. Therefore it is very important for us to protect trees.
7. How can you contribute to the maintenance of green wealth of your locality? Make a list of actions to be taken by you.
Solution:
We can contribute to the maintenance of green wealth of our locality by doing the following things-
– Planting more trees and plants.
– Taking care of the plants and trees that are already present in the locality.
– Making people aware of the concequences of cutting trees and helping them to understand about a green and clean environment.
– Not throwing waste here and there.
– Encouraging people to plant more trees.
– Using less paper and recycling it.
8. Explain how deforestation leads to reduced rainfall.
Solution:
Deforestation is the process of cutting tress or removing trees from a particular area. Trees absorb CO2 from the environment and help to manage global warming. If trees will be cut, global warming will increase and the climate pattern will be affected along with the water cycle. Also Trees give out a huge amount of water in the form of water vapour during transpiration. The reduction of water vapour affects cloud formation and thus, results in less rainfall.
9. Find out about national parks in your state. Identify and show their location on the outline map of India.
Solution:
Some of the National parks in India are shown as follows-
10. Why should paper be saved? Prepare a list of ways by which you can save paper.
Solution: a lot many trees can be saved if we use paper wisely. Trees are used in the manufacturing of paper. If paper is not saved it causes cutting more and more trees. So we should save paper to protect our trees. Also many harmful chemicals are used for maaking paper, so we can also protect our environment by using less paper.
Ways in which we can save paper are as follows-
– Recycling the paper
– Using both sides of the paper for writing
– Not throwing papers here and there
– Making people aware about using the paper wisely
– Collecting waste papers and recycling them
11. Complete the word 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.
Solution:
Down
1. Endangered
2. Red Data Book
5. Deserts
Across
1. Extinct
3. Endemic
4. Biodiversity
Summary
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