Page 154 - Science Class 07

i Forests also provide habitats to millions of plants and animals.

i Forests maintain the balance of O and CO in the atmosphere.
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i Due to the loss of forests, many parts of the world are facing the problems of low rainfall
and increase in average temperature.

i Many species of plants and animals have been lost from the earth due to deforestation.
I Social Forestry and Van Mahotsava are some programme launched for the conservation and
regeneration of forests.

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A. Tick (3) the correct op on.
1. Which of the following things we do not get from the forests?
(a) Resins (b) Medicine
(c) Charcoal (d) Polythene

2. Which of the following is not a func on of forests?
(a) Maintaining environmental balance (b) Checking soil erosion
(c) Controlling pollu on (d) Causing flood

3. What do the forests not provide us?
(a) Sunlight (b) Shadow
(c) Flowers (d) Food
4. Which of the following is not a result of deforesta on?

(a) Climate change (b) Protec on of animals
(c) Soil erosion (d) Loss of habitat
5. Which of the following programmes is/are the forest regenera on programme(s)
give in brackets?
(a) Van Mahotsava (b) Social Forestry

(c) Both (a) & (b) (d) None of these
B. Fill in the blanks.
1. Forests contribute a lot in exchanging the quality of ____________________ .
2. Excessive exploita on of forests has resulted in ____________________ of forests.
3. Forests also help in ____________________ of nutrients.

4. Due to ____________________ a large part of the earth is facing the problem of low
rainfall.
5. ________________ has a great impact on the environment as well as on the living beings.
C. Write True or False.

1. Urbanisa on is the main responsible factor for deforesta on.
2. Forest also regulate stream flow and moderate soil erosion.
3. Due to no vegeta on, soil becomes dry.

154 Science-7