RBSE Class 8 Science Important Questions Chapter 7 Conservation of Plants and Animals

Rajasthan Board RBSE Class 8 Science Important Questions Chapter 7 Conservation of Plants and Animals Questions and Answers.

RBSE Class 8 Science Chapter 7 Important Questions Conservation of Plants and Animals

Objective Questions

Question 1.    
The gas increases in the atmosphere by deforestation, is:
(a) Oxygen 
(b) Carbon dioxide 
(c) Nitrogen 
(d) (b) and (c) both
Answer:
(b) Carbon dioxide 

Question 2.    
The part of the earth where living organisms are found, is called
(a) Hydrosphere    
(b) Geosphere
(c) Biosphere    
(d) Exosphere
Answer:
(c) Biosphere    

Question 3.    
Great Indian squirrel's name is
(a) Bison    
(b) Kishan
(c) Ratan    
(d) None of above
Answer:
(a) Bison    

Question 4.    
The first reserve forest of India is
(a) Satpura national park
(b) Pachmarhi park
(c) Bharatpur sanctuary
(d) Kajirapga national park
Answer:
(a) Satpura national park

Question 5.    
How many trees are to be cut for obtaining one ton of paper, the number is
(a) 7    
(b) 17
(c) 27    
(d) 37
Answer:
(b) 17

Fill in the blanks 
1. ..................... means that living organisms different varieties found in a particular area.
Answer:
Biodiversity

2. Endangerd species are those which are going ..................... 
Answer:
extinct

3. ..................... keeps the record of endangered species.
Answer:
Red data book

4. ..................... are the areas meant for conservation of biodiversity.
Answer:
Biosphere reserves.

True/False

Mark the 'T' on true and 'F' on false the undermentioned statement

1. Deforestation increases the temperature and pollution on the earth.
Answer:
True

2. Plants found in a particular area, are called fauna of that area.
Answer:
False

3. Important persons' names are written in the red data book.
Answer:
False

4. Endemic species are found exclusively in a particular area.
Answer:
True

5. Deforestation can be reduced by recycling of paper.
Answer:
True

6. House rat is an endangered species. 
Answer:
False

Match the words given in 'Column-A' with 'Column-B'
Question 1. 

Column-A	Column-B
(i) Deforestation	(a) Conversion of fertile land into desert
(ii) Drought	(b) Decrease in rainfall
(iii) Reforestation	(c) Depletion of forest
(iv) Desertification	(d) Planting new trees

Answer:

Column-A	Column-B
(i) Deforestation	(c) Depletion of forest
(ii) Drought	(b) Decrease in rainfall
(iii) Reforestation	(d) Planting new trees
(iv) Desertification	(a) Conversion of fertile land into desert

Question 2.

Column-A	Column-B
(i) Migratory bird	(a) Siberian crane
(ii) Endangered species	(b) Tiger
(iii) Extinct species	(c) Dinosaurs
(iv) Endemic species	(d) Bison

Answer:

Column-A	Column-B
(i) Migratory bird	(a) Siberian crane
(ii) Endangered species	(b) Tiger
(iii) Extinct species	(c) Dinosaurs
(iv) Endemic species	(d) Bison

Very Short Answer Type Questions

Question 1. 
What do you mean by desertification? 
Answer:
Removal of top layer of soil destroy its humus and fertility. Gradually the fertile land gets converted into deserts. It is called desertification.

Question 2. 
What do you mean by sanctuary?
Answer:
Areas where animals and their habitats are protected from any disturbance, are called sanctuaries.

Question 3. 
What do you mean by national park? 
Answer:
Areas reserved for wild life where they can freely use the habitats and natural resources, are called national parks.

Question 4. 
What are the biosphere reserves?
Answer:
Large areas of protected land for conservation of wild life, plants and animals resources and traditional life of the tribals living in the area, are known as biosphere reserves.

Question 5. 
Write the name of one national park and two wild animal sanctuaries of Pachmarhi biosphere reserve.
Answer:
National park: Satpura
Wild animal sanctuaries: Bori and Pachmarhi.

Question 6. 
What do you mean by species?
Answer:
Species is a group of population which are capable of interbreeding and have common characteristics.

Question 7. 
What are the endangered animals? 
Answer:
Those animals whose numbers are declining to a level that can extinct, are known as endangered animals.

Question 8. 
Write the name of four endangered animals.
Answer:

1. White elephant 
2. Lion 
3. Wild buffalo and 
4. Antelope.

Question 9. 
To whom we call migratory birds?
Answer:
Such birds which fly covering long distance to reach another land, are known as migratory birds.

Question 10. 
What is the object of Indian Forest (Conservation) Act?
Answer:
The objectives of this act is the protection and conservation of natural forests.

Short Answer Type Questions

Question 1. 
Deforestation can be checked by recycling of paper. Prove it.
Answer:
We know that to obtain the one ton of paper, 17 fully grown trees are cut, thus by recycle of paper we can reduce the deforestation. Paper can be recycled five to seven times for use. With the recycling of paper, many trees can be saved in one year.

Question 2. 
Whattis meant by biosphere? Why biosphere reserves are formed?
Answer:
Biosphere:
Biosphere is that part of the earth where living organisms exist or which support life, is called biosphere. Biosphere reserves are the areas meant for conservation of biodiversity. Biodiversity is the variety of plants, animals and microorganisms generally found in an area.

The biosphere reserves help to maintain the biodiversity and culture of that area. A biosphere reserve may also contain other protected areas in it. The Pachamarhi Biosphere Reserve consists of one national park named Satpura and two wildlife sanctuaries named Bori and Pachmarhi. Biosphere reserve also protects that area's ecosystem.

Question 3. 
What do you mean by flora and fauna? Explain.
Answer:
Flora:
Plants Flound in a particular area is known as flora of that area, for example: in Pachmarhi biosphere reserve sal, teak, mango, jamun, silver ferns, aijun etc. are the flora.

Fauna:
Animals found in a particular area is known as fauna of that area, for example: chinkara, blue bull, barking deer, cheetal, leopard, wild dog, wolf etc. is the fauna of the Pachmarhi biosphere reserve.

Question 4. 
What do you mean by endemic species? Explain.
Answer:
Endemic species:
The species of plants and animals which are found exclusively in a particular area, are called endemic species, e.g., sal and wild mango tree are examples of endemic flora of Pachmarhi biosphere reserve. Giant squirrel is the endemic animal of this area. 

Question 5. 
What do you mean by wildlife sanctuaries? Explain.
Answer:
Wildlife sanctuary:
In such areas animals are protected. Sanctuaries are places where killing (poaching) or capturing of animals is strictly prohibited. Sanctuaries provide protection and conservation of endangered animals. Example: In Pachmarhi wildlife sanctuary, black buck, white eyed buck, elephant, golden cat, pink headed duck, gharial, marsh crocodile, python, rhinoceros, etc. endangered wild animals are protected and preserved. Indian sanctuaries have unique landscapes level forests, mountain forests and bush lands in deltas of big rivers. Here animals get natural suitable living conditions.

Question 6. 
What do you know about the Satpura national park?
Answer:
Satpura national park:
This is a vast reserve area. Here all components of environment are completely conserved. They preserve flora, fauna, landscape and historic objects. Satpura national park is the first reserve forest of India. Rock shelters are also found inside the Satpura National Park. These are the prehistoric evidences of human life in these jungles. They give us an idea of the life of the primitive people. Rock paintings are found in these shelters. A total of 55 rock shelters have been identified in Pachmarhi Biosphere Reserve. 

Question 7. 
What is tiger project? Explain.
Answer:
Project tiger was launched by the government to protect the tigers in the country. The objective of this project was to ensure the survival and maintenance of the tiger population in the country. Tiger is one of the many species which is slowly disappearing from our forests. But, the Satpura Tiger Reserve is unique in the sense that a significant increase in the population of tigers has been seen here.

Question 8. 
What are the components in the formation of ecosystem? Can small animals also effect the ecosystem?
Answer:
An ecosystem is made of all the living components like plants, animals and microorganisms in an area along with non - living components such as climate, soil, river, deltas etc. Small animals also effect the ecosystem for example if we kill snakes, frogs, lizards, bats etc. they will effect food chain and food web because the organism dependent on them will be destroyed and their population will increase and directly effect the ecosystem. In this way ecosystem will be imbalanced.

Essay Type Questions

Question 1. 
Why wildlife conservation is necessary?
Answer:
The following are the reasons for conservation of wild life:
1. Conservation of wild life is necessary to maintain ecological balance in nature. For example, if we restrict poaching carnivorous animals like lions and tigers living in forests, we can conserve them and they will control the number of herbivorous animals like buck, which eat green plants of the forest. By this the plants remain protected and ecological balance is maintained.

2. In nature to protect the gene pool conservation of wildlife it is necessary to protect the complete extinction of animals and rare species of birds from earth is necessary for conservation of wildlife.

3. Economically wildlife is also useful to us. Thousand tourists visits in our country to watch them from whom we earns foreign currency. Some animals only are found in India, example one homed rhinoceros of West Bengal, royal Bengal tiger etc.