NCERT Class VIII Science Solutions: Chapter 7-Conservation of Plants and Animals Part 6

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Question 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.

Answer:

The ever increasing demand in factories and for shelter, trees are being continually cut. If we have to retain our green wealth for generations, plantation of more trees is the only option. Cutting of trees can only be justified when reforestation is done. Reforestation is the restocking of destroyed forests by planting new trees. The trees planted should be of the same species that are generally found in the forests. We should plant as many trees as we cut. Reforestation can take place naturally also if the land is left undisturbed. The forests will establish itself over a period of time. We have damaged our forests to such an extent that it is difficult to retain the green wealth for our future generations. So it is very important to plant more trees and to find out ways of recycling and restoring our natural wealth.

Image result for forest cutting

Forest Cutting

Question 7:

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

Answer:

The green wealth of the locality is the responsibility of every resident. We should grow more and more plants in the locality. The resident should work together to conserve the green belt of the locality. Also they should be taught about the consequences of deforestation and global warming.

I plant trees in my locality. I also teach the small children and encourage the slogan one man one tree every year, so that every resident plants at least one tree in a year and takes care of it.

Image result for maintenance of green

Maintenance of Green

Question 8:

Explain how deforestation leads to reduced rainfall.

Answer:

Plants need carbon dioxide for photosynthesis. Fewer trees would mean that less carbon dioxide will be used up resulting in its increased amount in the atmosphere. This will lead to global warming as carbon dioxide traps the heat rays reflected by the earth. The increase in temperature on the earth disturbs the water cycle and may reduce rainfall.

Question 9:

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

Answer:

Do yourself according to your state.

This map shows National Park in Gujarat

Map of National Park in Gujarat

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