NCERT Class VII Science Solutions: Chapter 17-Forests: Our Lifeline Part 3

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SHORT ANSWER QUESTIONS

Question 14:

Give names of any four birds which you expect to see in a forest.

Answer:

Jungle crow, myna, dove, kingfisher, koel, blue jay, hornbill, etc. (any four)

Question 15:

Two friends shared their experiences of their vacation trip to two different forests. Do you think they would have seen the same type of plants and animals during their respective trips? Give reason.

Answer:

No, they would not have seen the same type of plants and animals. This is so because climatic conditions in the two forests would vary leading to variations in the types of plants and animals.

Question 16:

A bunch of seedlings were seen sprouting on a heap of animal dropping in a forest.” How do you think is the seedling benefited from the animal dung?

Answer:

The decaying animal dung provides nutrients to the growing seedlings.

Question 17:

Match Column I with Column II

Match the Column I and Column II (Q)
Match the Column I and Column II (Q)

Column I

Column II

Decomposers

Dead plant and animal tissues

Canopy

Habitats for wild life

Porcupine

Micro-organisms

Humus

Wild animal

Forest

Branches of tall trees.

Answer:

Match the Column I and Column II (A)
Match the Column I and Column II (A)

Column I

Column II

Decomposers

iii Micro-organisms

Canopy

v Branches of tall trees.

Porcupine

iv Wild animal

Humus

i Dead plant and animal tissues

Forest

ii Habitats for wild life

Question 18:

Deforestation may lead to floods. Why?

Answer:

Lesser number of trees will be available due to deforestation. In the absence of trees and plants of the forest, the excessive amount of rainwater falling during heavy rains cannot be absorbed into forest ground. The large amount of rainwater will then suddenly flow into rivers causing the flooding of rivers.

Image of what is deforestation

What is Deforestation

Image of what is deforestation

Question 19:

Name any four useful products other than wood, which we get from forests.

Answer:

Gum, oils, spices, fodder for animals, medicinal plants, etc. (any four).

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