SSC Worksheet for Chapter - 10 Conservation of plants and Animals Class 8

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Find SSC Worksheet for chapter-10 Conservation of plants and Animals class 8

CLASS-8

BOARD: SSC

BIOLOGY Worksheet -10

TOPIC: Conservation of plants and Animals

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1. A place where animals are protected in their natural habitat is called ____________.

2. In a wild life sanctuary, poaching of animals is ________.

3. The human activity that is responsible for loss of biodiversity is –

(a) Urbanization

(b) Afforestation

(c) Establishment of biosphere reserve

(d) Respiration

4. Which is not a consequence of deforestation?

(a) Desertification

(b) Global warming

(c) Poaching

(d) Floods

5. Differentiate between wildlife sanctuary and biosphere reserve.

6. Discuss the effects of deforestation on the following:

(a) Wild animals

(b) Villages (Rural areas)

7. What will happen if the top layer of soil is exposed?

8. Why should we conserve biodiversity?

9. List four ways in which forests are useful to us.

10. Explain how deforestation leads to reduced rainfall.

Solutions: to worksheet-10 Topic- Conservation of plants and Animals

1. Biosphere reserve

2. Prohibited

3. (a) Urbanization

4. (c) Poaching

5.

Wildlife Sanctuary	Biosphere Reserve
(a) It is an area within which animals are protected from possible dangers such as hunting. Their habitat is also conserved in this area (b) It provides protection and suitable living conditions (c) Example: Pachmarhi Sanctuary	(a) It is a large protected area constructed for the conservation of biodiversity (b) It helps in the conservation of various life forms such as plants animals and microorgananisms.   (c) Example: Pachmarhi biosphere reserve.

6. Effects of deforestation:

(a) Wild Animals: Deforestation destroys the habitat of many wild animals. The habitat of an animal provides shelter, food and protection to animals. If the habitat of an animal is disturbed then it will force the animals to go to other places in search of food and shelter. As a result, the animal could get killed easily by other animals in the process.

(b) Villages: Deforestation leads to desertification. In the absence of trees, soil erosion occurs more

rapidly exposing the lower hard and rocky layer. As a result, soil loses humus and becomes less

fertile. Hence, a fertile land which acts as a source of living for villagers, gets converted into a desert. It also reduces the ground water level, which may lead to natural calamities and thus have an adverse effect on villages.

7. If the top layer of the soil is exposed, it will be easily removed by the action of high speed winds or water flow. This leads to soil erosion and may result in desertification.

8. Biodiversity of earth includes all organisms, big and small, plants, animals and even microorganisms. They are the sources of natural resource which are been exploited by mankind so much that many plants and animal species have become extinct. Hence, in order to protect these natural resources, we need to conserve biodiversity.

9. Uses of forests:

(a) Forests provide us with products such as gum, timber, medicines etc.

(b) Forests maintains a balance between CO₂ and oxygen levels.

(c) Certain rare medicinal herbs and alkaloids are obtained from forests.

(d) Animal skin, perfume are also obtained from forests.

10. Deforestation increases the temperature and pollution level on earth. If plants are destroyed then he level of CO₂ in the atmosphere will rise. As a result, CO₂ will trap more radiations there by adding to global warming. An increase in the temperature of the earth will disturb the natural water cycle. As a result, there will be change in rainfall pattern, this could lead to drought. Thus deforestation leads to reduced rainfall.