PSEB Class 7 Science Chapter 17 Forests: Our Lifeline Solution

PSEB Class 7 Science Chapter 17 Forests: Our Lifeline SolutionPSEB Punjab Board Class 7 Science Textbook Solution Chapter 17 Forests: Our Lifeline Exercise Questions and Answers



Chapter 17 Forests: Our Lifeline

Q.1 Fill in the blanks:

(i) Animals helps plants in the ……………… of seeds.

Answer: formation.


(ii) ………………… gas is released by plants during photosynthesis.

Answer: Oxygen.


(iii) …………….. and ……………….. are major threats to forest.

Answer: Fire, Pollution.


(iv) Large scale planting of tree sapling is called …………….. .

Answer:- Afforestation.


Q.2 True or false:

(i) Animals provide nutrients to plants.

Answer: False


(ii) The forest cover in India is only 15% of its total land area.

Answer: False


(iii) Crown is the shape of the trees.

Answer: True


(iv) Deforestation is cutting of trees to clear area for building houses and farming.

Answer: True


(v) Deforestation takes place due to overgrazing.

Answer: True


Q.3 Match the following.


1. Plants :- d. Producers.

2. A renewable natural sources :- a. Forest.

3. Afforestation :- b. Practice of planting trees on a largescale.

4. Removal of plants :- c. Deforestation


Q.4 Choose the correct answer.

(i) Which of the following is not a forest product ?

(a) Plywood

(b) Kerosene

(c) Sealing wax

(d) Gum.

Answer: (b) Kerosene.


(ii) A food chain includes:

(a) Producers and herbivores

(b) Producers and carnivores

(c) Producer and decomposers

(d) Producers, herbivores and carnivores.

Answer: (d) Producers, herbivores and carnivores.


(iii) Bacteria and fungi act as:

(a) Decomposers

(b) Herbivores

(c) Omnivores

(d) Carnivores.

Answer: (d) Carnivores.


(iv) Microorganisms act upon the dead organisms to produce:

(a) Humus

(b) Wood

(c) Soil

(d) All of these

Answer: (a) Humus.



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Updated: August 24, 2022 — 10:56 pm

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