Conservation of Plants and Animals| NCERT Solutions| Class 8

NCERT Solutions of Chapter: Conservation of Plants and Animals. NCERT Solutions along with worksheets and notes for Class 8.

(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.

Ans-

(a) A place where animals are protected in their natural habitat is called  —–.

(b) Species found only in a particular area is known as endemic spices.

(c) Migratory birds fly to far away places because of climate Changes.

 

(2)Differentiate between the following.

(a) Wildlife sanctuary and biosphere reserve

(b) Zoo and wildlife sanctuary

(c) Endangered and extinct spices

(d) Flora and fauna

Ans-

(a) Differences between wildlife sanctuary and biosphere reserve are tabulated below:-

SN Wildlife Sanctuary Biosphere Reserve
1. It protects the animals It conserves the biodiversity and culture of the area.
2. It is small in size. It is big in size. It can incude many wildlife sanctuaries and national park in it.
3. It is notified by state govermment. These are established by the countries under the UNESCO’s Mna and The Biosphere program.
4. Eg:- Panchmari Wildlife Sanctuary Eg:- The Panchmari Biosphere Reserve consists of one national park named Satpura and two wildlife sanctuaries named Bori and Panchmari.

 

(b) Differences between Zoo and wildlife sanctuary are tabulated below:-

SN Zoo Wildlife Sanctuary
1. It has very small area It is comparatively large area
2. It is protected behind the walls. It is not protected by the walls.
3. Animals live in similar to natural habitat but it is not natural. Animals live in natural habitat.
4. Animals are provided food by humans. Animals have food on their own.
5. Regular health checkup is done by doctors. No health checkup is done by doctors.
6. Eg:- Delhi Zoo Eg:- Panchmari Wildlife Sanctuary

(c) Differences between endangered and extinct spices are tabulated below:-

SN Endangered Spices Extinct Spices
1. The members of these spices are diminishing in numbers. No members of this spices are found.
2. The members of these spices are about to extinct. They had already extinct.
3. Eg:- Tiger, barahsinga, black bug etc. Eg:- Dinosaurs etc.

(d) Differences between flora and fauna are tabulated below:-

SN Flora Fauna
1. The plants found in a particular area are termed as flora. The animals found in a particular area are termed as fauna.
2. Eg:- Sal , teak, mango etc. Eg:- Deer, elephant etc.

 

(3) Discuss the effects of deforestation on the following.

(a) Wild animals

(b) Environment

(c) Villages (Rural areas)

(d) Citie(Urban areas)

(e) Earth

(f) The next generation

Ans-

(a) The effects of deforestation on the wild animals are given below:-

(i) Animals lose their homes.

(ii) Some times animals die due to temperature rise and lack of water. They have to wander from one place to another place in search of water when temperature is high due to deforestation. Therefore, some of them lose their lives in transferring themselves.

(iii) Herbivore animals do not get food due to cutting of trees and carnivore animals also do not get food as animals begin to die due to deforestation.

(b) The effects of deforestation on the environment are given below:-

(i) Deforestation increases temperature and pollution level on the earth.

(ii) Trees absorb carbon – di oxide and release oxygen. But after cutting trees, level of carbon – dioxide increases in the environment. It leads to global warming as carbon dioxide traps the heat rays reflected by the earth.

(iii) Ground water level decreases because forest causes rain and water seeps in to earth. Thus, ground water level increases.

(iv) Increasing temperature of earth and disturbed water cycle causes droughts on the earth.

(c) The effects of deforestation on the villages (rural area) are given below:-

(i)Villagers depends on forest for their daily needs as fruit, wood as fuel etc.. But after deforestation they do not get these things.

(ii) Wild animals lose their natural habitat or their houses after deforestarion. Thus, they move to villages for shelter and food which causes danger for the villagers.

(iii) Deforestation causes flood and drought which adversely effects villagers life.

(d) The effects of deforestation on the cities (Urban area) are given below:-

(i) Deforestation causes pollution which effects health of the citizens adversely.

(ii) Deforestation causes floods and droughts which also adversely effects life of cities.

(iii) Ground water level decreases due to deforestation. Therefore, cities have to face problem of water supply.

(e) Trees absorb carbon – di oxide and release oxygen. But after cutting trees, level of carbon – dioxide increases in the environment. It leads to global warming as carbon dioxide traps the heat rays reflected by the earth.

(f) The effects of deforestation on the next generation are given below:-

(i) Many animals are extinct now. The next generation can not see them.

(ii) Deforestation causes pollution. Due to this, our new generation is lacking their health.

(iii) Water level is low because of deforestation. Therefore, new generation will not get clean water in future.

 

(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.

Ans-

(a) If we go on cutting trees it will adversely effects our environment, earth, wild life, villages and cities. It will cause global warming, pollution, flood, drought etc.

(b) If the habitat of an animal is disturbed they will endangered because they will not get food and shelter which will lead to their extinct.

(c) If top layer of the soil is exposed fertile land converts in to dessert. Due to deforestation upper fertile layer of the soil removed by soil erosion and hard lower layers come up which has les humus and less fertility. With the passage of time, fertile lands get converted into dessert.

 

(5) Answer in brief.

(a) Why should we converse biodiversity?

(b) Protected forests are also not completely safe 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?

Ans-

(a) Biodiversity is the variety of plants, animals and microorganisms generally found in an area. Lack of biodiversity disturbs our environment and ecosystem which is not good for humans and living beings. We should conserve biodiversity to conserve our environment, forest and eco system.

(b)Yes, protected forests are also not completely safe wild animals because of poaching. Many people or poachers enter in to the forest for their own selfishness. They cut trees and kill animal only for making money.

(c) In our country there are many tribes who lives in forest and depend for their livelihood on the forests. They use trees fruits, leaves, animals, caves for food, fuel and shelter.

(d) Purposes to cut trees are mentioned below:-

(i) Construction of road

(ii) Construction of buildings

(iii) Industrial development

(iv) Increasing demand for wood

(v) Over grazing of animals

(vi) Indiscriminate felling of trees

(vii) Making furniture or using wood as fuel

(viii) Severe droughts and forest fires are some natural causes for deforestation.

(ix) Trees also cut for paper making. According to an assessment 17 full grown trees used in making one tone paper. Thus, we should recycle them.

 

(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.

Ans- In order to meet the ever – increasing demand in factories and for shelter, trees are being continually cut which causes many adverse effects on the environment. The consequences are listed below:

(i) Deforestation increases temperature and pollution level on the earth.

(ii) Trees absorb carbon – di oxide and release oxygen. But after cutting trees, level of carbon – dioxide increases in the environment. It leads to global warming as carbon dioxide traps the heat rays reflected by the earth.

(iii) Ground water level decreases because forest causes rain and water seeps in to earth. Thus, ground water level increases.

(iv) Increasing temperature of earth and disturbed water cycle causes droughts on the earth.

 (v) Deforestation also causes flood. Water holding capacity of the trees lower down, it causes floods.

(vi) The other properties of the soil as nutrients, content and texture etc. also changes because of the deforestation.

(vii) Wild animals lose their homes.

Therefore, it is not justified to cut trees to meet our requirements in factories and for shelter.

 

(7) How can you contribute to the maintenance of green wealth of your locality? Make a list of actions to be taken by you.

Ans- The actions which will be taken by me to maintain greenery of my locality are listed below:

(i) I will grow more tree.

(ii) Care of plants by providing them water, fertilisers etc.

(iii) Protect them from animals and humans.

(iv) Educate people about the importance of trees.

 

(8) Explain how deforestation leads to reduced rainfall.

Ans- The trees take water from the soil and give off in the environment by the stomata of leaves. The leaves lose water as water vapour in the environment during photosynthesis. It increases moisture in the environment. This happen continuously in the environment. After sometime, leaves are not able to release water in air which leads to precipitation or saturation of water vapour in the air. Therefore, water fall down on the Earth and it is called rain.

 

(9) Find out about national parks in your state. Identify and show their location on the outline map of India.

Ans- The national parks in the Uttar Pradesh is Dudhwa National Park, located in Lakhimpur Kheri district.

 

(10) Why should paper be saved? Prepare a list of ways by which you can save paper.

Ans- Trees also cut for paper making. According to an assessment 17 full grown trees used in making one tone paper. Thus, we should recycle them. Thus, paper should be saved.

The activities are listed below to save paper.

(i) Reuse both sides of paper.

(ii) Print only necessary documents.

(iii) Use electronic medium for messaging, receipts, notes, tickets etc.

(iv) Use cloth instead of paper to mop floor.

 

(11) Complete the word puzzle.

Down

(1) Species on the verge of extinction.

(2) A book carrying information about endangered species.

(5) Consequences of deforestation.

Across

(1) Species which have vanished.

(3) Species found only in a particu;ar habitat.

(4) Variety of plants, animals and microorganisms found in an area.Conservation of plants and animals, NCERT, class 8

Ans-

Conservation of plants and animals, NCERT, class8

Helping Topics

Conservation of Plants and Animals

Worksheet Class 8

Drought

Flood

Biodiversity

Endangered Animals

Rain Caused by Trees

 

 

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