Question

summary of lesson 7 *conservation of plant and animals*
grade 8th​

Answer 1

Answer:

(i) It is a large protected area constructed for the conservation of biodiversity. (ii) It provides protection and suitable living conditions to wild animals. (ii) It helps in the conservation of various life forms such as plants, animals, and micro- organisms. (iii) Pachmarhi sanctuary is a wildlife sanctuary

Answer 2

Answer:

Consequences of deforestation:

1. Increase in the temperature and pollution level.

2. Decrease in the ground water level.

3. Decrease in rainfall and fertility of soil.

4. Increase in natural calamities like floods, droughts, etc.

5. Decrease in the water holding capacity and water infiltration rate of soil. The other properties of the soil like nutrient content, texture, etc., also change because of deforestation

6. Global warming:

Deforestation will decrease number of trees that will lead to increase in carbon dioxide level in the atmosphere.  The carbon dioxide gas traps the heat rays reflected from earth’s surface and this will result in increase in temperature on earth and it will disturb the water cycle too and may reduce rainfall. This could cause droughts.

Conservation of Forest and Wildlife:

(i) To prevent deforestation and for the conservation of forests and wildlife, the government has implement many rules, methods and policies.

(ii) Amongst many steps, areas called sanctuaries, national parks and biosphere reserves have been marked where activities like plantation, cultivation, grazing, hunting, poaching, etc. are prohibited.

Sanctuary:

(i) These are the places where animals and their habitants are safe from any external disturbances with very limited human activities.

(ii) Some of the well known sanctuaries in India are Corbett National Park in Uttarakhand, Ranthambore National Park in Rajasthan, etc.

National Park:

(i) These are the places where animals can use their habitats and natural resources freely.

(ii) Some of the well known sanctuaries in India are Bandipur National Park in Karnataka, Keoladeo Ghana National Park in Rajasthan, etc.

Biological Diversity or Biodiversity:

(i) It refers to the variety of organisms living on the earth, their inter-relationships and their relationships with the environment.

(ii) Some of the well known biosphere reserves in India are Nilgiri biosphere reserve in Karnataka, Sunder bans in West Bengal, etc.

(iii) The Pachmarhi Biosphere Reserve consists of one national park named as Satpura and two wildlife sanctuaries named as Bori and Pachmarhi.