CHAPTER-17, FORESTS
1. Which of the following is NOT a consequence of deforestation?
a) Increased levels of ground water.
b) Removal of the top layer of soil by wind.
c) Increased levels of carbon dioxide in the atmosphere.
d) Destruction of the natural habitats of plants and animals.
2. Which of the following plays an important role in causing rainfall?
a) Vehicles
b) factories
c) Animals
d) Plants
3. Which of the following process is responsible for the release of carbon dioxide
by animals?
a) photosynthesis
b) Reproduction
c) Digestion
d) Respiration
4. In which of the following group of animals vultures and jackals are included?
a) Decomposers
b) Producers
c) Scavangers
d) parasites
5. Which of the following statements is not correct?
a) Soil helps the forest to grow and regenerate.
b) Forests protects the soil from erosion.
c) Forest do not influence the climate.
d) plants and animals in a forest are interdependent on one another.
6. The image shows a food web that includes three food chains.
Which animals, involved in the food web, would be affected in the absence of
plants?
a) Only kit fox and golden eagle
b) Only scorpion and ground squirrel
c) Only grasshopper and ground squirrel
d) All the animals involved in the food web
7. Which one of the following is the primary consumer in the given food chain?
Green plants ------ Deer --------- Lion
a) Deer
b) Lion
c) Green Plants
d) All of the above
8. Which one of the following is not a wild animal?
a) Bear
b) Bison
c) Jackal
d) Goat
9. Which of the following is not the name of a tree?
a) Teak
b) Sal
c) Porcupine
d) Kachnar
10. Which of the following forms the lowermost layer of forest?
a) Tall tree
b) Herbs
c) Shrubs
d) None of these
11. State the consequence when one food chain is disturbed in an ecosystem.
12. While going inside a forest, it becomes darker. Why?
13. Plants are known as the producers of a food chain. Give reason.
14. Paheli wrote a food chain in the following way:
Frog → Eagle → Insects → Grass → Snake
The chain is not in the correct order. Help her to write the food chain correctly.
15. Give the reason behind variations found in the forests of different regions.
16. Y and Z are two types of organism which are found in the forests. Y eats up
dead animals while Z breakdown the body of the dead animals into simpler
substances.
a) What is the general name of organism Y?
b) Write one example of Y type organism.
c) What is general name of organism Z?
d) Write one example of Z type organism.
17. Give any four factors which are responsible for the destruction of forests.
18. Crown is different from canopy. Explain how.
19. Sketch a diagram to show how plants maintain the balance between carbon
dioxide and oxygen in the atmosphere?
20. Consider the following organisms:
Grass, birds, frog, crow, tiger, vulture, toadstool, deer.
Which of these
(i) can eat the dead animals
(ii) can form a three- step food chain?
21. a. Plants help in maintaining O 2-CO2 cycle. Explain it in the light of
photosynthesis and respiration.
b. Forests are called green lungs. Why?
22. People say that nothing goes waste in a forest. Can you explain how?
