PSEB 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.
(ii) ………………… gas is released by plants during photosynthesis.
(iii) …………….. and ……………….. are major threats to forest.
Answer: Fire, Pollution.
(iv) Large scale planting of tree sapling is called …………….. .
Q.2 True or false:
(i) Animals provide nutrients to plants.
(ii) The forest cover in India is only 15% of its total land area.
(iii) Crown is the shape of the trees.
(iv) Deforestation is cutting of trees to clear area for building houses and farming.
(v) Deforestation takes place due to overgrazing.
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 ?
(c) Sealing wax
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:
Answer: (d) Carnivores.
(iv) Microorganisms act upon the dead organisms to produce:
(d) All of these
Answer: (a) Humus.
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