Class 7 chemistry MCQs with answers are provided here for Chapter 17, Forests: Our Lifeline. These MCQs are based on the CBSE board curriculum and correspond to the most recent Class 7 chemistry syllabus. By practising these Class 7 multiple choice questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 7 annual examinations as well as other competitive exams.
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Class 7 Forests Our Lifeline MCQs
1. The branchy element of a tree above the stem is known as ______.
a) Litter
b) Humus
c) Crown
d) None of the above
Answer: c
2. Which of the following trees provides medicine for treating malaria?
a) Eucalyptus tree
b) Cinchona tree
c) Bamboo tree
d) None of the above
Answer: b
3. Forests are also known as ______.
a) Green kidney
b) Green lungs
c) Greenheart
d) None of the above
Answer: b
Explanation: Forests are also known as the green lungs as they give oxygen for breathing and help maintain the oxygen-carbon dioxide balance in the atmosphere.
4. Which of the following statements is not correct?
a) Trees are not an essential element of the environment
b) Forest help to prevent soil erosion
c) Forest is a renewable resource
d) Trees help regulate the climate
Answer: a
Explanation: Trees are the essential elements of the environment. They give oxygen for breathing and help maintain the oxygen-carbon dioxide balance in the atmosphere. They also encourage jovial well-being.
5. Which of the following increases the carbon dioxide level in the atmosphere?
a) Afforestation
b) Deforestation
c) Social forestry
d) None of the above
Answer: b
Explanation: Deforestation refers to the mass-scale falling of trees. Plants inhale carbon dioxide and exhale oxygen. Mass scale deforestation may contribute to a 10% increase in the carbon dioxide level in the atmosphere.
6. What is the Latin name for the forest?
a) Foris
b) Forse
c) Forums
d) None of the above
Answer: a
Explanation: The term forest is derived from the Latin word foris, which means a place or land inhabited by cultivated plants and wild animals.
7. What is the main product of forest?
a) Medicine
b) Fruit
c) Timber
d) All of the above
Answer: c
Explanation: Timber is the main product of forest. Trees such as sal, mahogany, rosewood and teak provide timber for commercial use.
8. Which of the following is used to make paint?
a) Resin
b) Latex
c) Both (a) and (b)
d) None of the above
Answer: a
9. Which of the following is used to make rubber?
a) Resin
b) Latex
c) Both (a) and (b)
d) None of the above
Answer: b
10. Which of the following trees provide timber?
a) Sal
b) Mahogany
c) Teak
d) All of the above
Answer: d
11. Which of the following is not a forest product?
a) Latex
b) Resin
c) Kerosene
d) None of the above
Answer: c
Explanation: Forest provides us with multiple valuable products like latex used for making rubber, resins used for making paint, the wood used for making paper, board, plywood and saw. In contrast, kerosene is a petroleum product obtained from crude oil.
12. Which of the following is a scavenger?
a) Jackal
b) Vulture
c) Crow
d) All of the above
Answer: d
Explanation: Jackal, vulture and crow are examples of scavengers. They eat dead animals and aid in keeping the forest surroundings clean.
13. Which of the following plants is used to make medicines?
a) Acacia
b) Neem
c) Amla
d) All of the above
Answer: d
Explanation: Several plants are used to make medicines. They are known as medicinal plants. Acacia, neem, amla, eucalyptus, etc., are used in making many ayurvedic medicines. The cinchona plant provides quinine used for treating malaria.
14. ______ is obtained from coconut.
a) Coir
b) Jute
c) Linen
d) All of the above
Answer: a
Explanation: Coir is obtained from coconut. It is used to make rope, doormats and mattresses.
15. Which of the following is a wood-based product?
a) Board
b) Plywood
c) Saw
d) All of the above
Answer: d
Explanation: Paper, board, plywood, and saw are the primary products obtained from wood. Pulp is the basic ingredient for their manufacturing.
16. Trees falling on a mass scale are known as _____.
a) Agroforestry
b) Afforestation
c) Deforestation
d) None of the above
Answer: c
Explanation: Deforestation refers to the purposeful clearing of forested land for constructing dams, roads, railways, etc.
17. Planting of trees on a large scale is known as ________.
a) Agroforestry
b) Afforestation
c) Deforestation
d) None of the above
Answer: b
Explanation: Afforestation refers to the plantation of trees on a large scale in an area where there was no previous tree cover.
18. Who is the father of the Chipko movement?
a) Nathuram Bahuguna
b) Sunderlal Bahuguna
c) Sitaram Bahuguna
d) None of the above
Answer: b
Explanation: Sunderlal Bahuguna is the father of the Chipko movement. It was started in 1974 by some village women to reduce trees falling (deforestation). The villagers came forward and hugged the trees to prevent the contractor from felling them.
19. Several food chains exist in a forest together to form a ______.
a) Food web
b) Food box
c) Both (a) and (b)
d) None of the above
Answer: a
Explanation: Several food chains exist in a forest together to form a food web. The organisms are interdependent in the food web. The arrow on the food web indicates the direction of energy flow.
20. How many tiger reserves are there in India?
a) 27
b) 25
c) 21
d) None of the above
Answer: a
Read Also:
- Forest Conservation – Why and How?
- Introduction: Importance of Forest
- Deforestation Process
- Reforestation
- Chemistry Worksheet Class 7 on Chapter 17 Forests: Our Lifeline with Answers – Set 1
- Chemistry Worksheet Class 7 on Chapter 17 Forests: Our Lifeline with Answers – Set 2
- Chemistry Worksheet Class 7 on Chapter 17 Forests: Our Lifeline with Answers – Set 3
- Chemistry Concept Questions and Answers
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