Class 7 Science Chapter 12 Practice Question Answers - Forests - Our Lifeline

Q1. The rainfall will be less in absence of:
(a) forests
(b) town
(c) village
(d) none of these
Ans: (a)
The rainfall will be less in absence of forests.

Q2. Which of the following is not a forest product:
(a) gum
(b) polywood
(c) sealing wax
(d) kerosene
Ans: (d)
Kerosene is not a forest product.

Q3. Which of the following statements is not correct:
(a) forests protect the soil from erosion.
(b) plants and animals in a forest are not depend on one another
(c) forests influence the climate and water cycle
(d) soil helps forests to grow and regenerate.
Ans: (b)
Plants and animals in a forest are not depend on one another.

Q4. Micro-organisms act upon the dead plants to produce:
(a) sand
(b) mushrooms
(c) humus
(d) wood
Ans: (c)
Micro-organisms act upon the dead plants to produce humus.

Q5. A dark coloured substance which is formed from the dead bodies of plants and animals is called:
(a) plants roots
(b) humus
(c) canopy
(d) none of these
Ans: (b)
Micro-organisms feed upon the dead plant and animal tissues and convert them into a dark coloured substance called humus.

Q6. The insects butterflies help flowering plant in:
(a) deforestation
(b) pollination
(c) humus
(d) none of these
Ans: (c)
The insects, butterflies help flowering plants in pollination.

Q7. A forest is a purifier of:
(a) water
(b) air
(c) both (a) and (b)
(d) none of these
Ans: (a)
A forest is a purifier of water and air.

Q8. Branchy part of a tree above the stem is known as the:
(a) crown
(b) canopy
(c) humus
(d) all the above
Ans: (c)
Branchy part of a tree above the stem is known as the crown.

Q9. Cutting and destroying the forests is called:
(a) erosion
(b) decomposers
(c) deforestation
(d) all the above
Ans: (b)
Cutting and destroying the forests is called deforestation.

Q10. The branches of the tall trees look like a roof over the other plants in the forest is called a:
(a) humus
(b) canopy
(c) crown
(d) none of these
Ans: (d)
Canopy is the branches of the tall trees look like a roof over the plants.

Q11. The plant also maintain the balance of oxygen and carbon dioxide in the atmosphere, so the forests are called:
(a) heart
(b) skin
(c) kidney
(d) lungs
Ans: (d)
The plant also maintain the balance of oxygen and carbon dioxide in the atmosphere, so the forests are lungs.

Q12. Forests protect the soil from:
(a) growth
(b) humus
(c) pollination
(d) erosion
Ans: (b)
Forests protect the soil from erosion.

Q13. Heavy rain may also damages the:
(a) roots
(b) soil
(c) humus
(d) none of these
Ans: (a)
Heavy rain fall, may also damages the soil.

Q14. Several beetles and grubs were feeding on the heap and a bunch of seedlings was:
(a) sprouting
(b) decomposing
(c) pollination
(d) all of these
Ans: (a)
Several beetles and grubs were feeding on a heap and a bunch of seedlings was sprouting.

Q15. Canopy is formed by:
(a) small trees
(b) herbs
(c) shurbs
(d) tall trees
Ans: (b)
Canopy is formed by tall trees.

Q16. Interdependence of animals for food is called:
(a) food order
(b) food cycle
(c) food chain
(d) none of these
Ans: (c)
Interdependence of animals for food is called food chain.

Q17. Nutrients are replenished in the soil through:
(a) water
(b) plant roots
(c) humus
(d) all of these
Ans: (c)
Nutrients are replenished in the soil through humus.

Q18. Which of the following is renewable resources:
(a) forest
(b) town
(c) village
(d) none of these
Ans: (a)
Forests is a renewable natural resources.

Q19. Forest protect soil from:
(a) erosion
(b) flooding
(c) spoiling
(d) all the above
Ans: (d)
Forest protect soil from erosion, flooding and spoiling.

Q20. Micro-organisms eating dead bodies of plants and animals are called:
(a) scavengers
(b) herbivores
(c) decomposers
(d) none of these
Ans: (c)
Micro-organisms eating dead bodies of plants and animals are decomposers.

Q21. Small trees and grass and shrubs form the:
(a) canopy
(b) lowest canopy
(c) under storeys
(d) all of these
Ans: (c)
Small trees and grass and shrubs form the under storeys.

Q22. Organisms which cannot be seen with naked eyes are called:
(a) macro-organisms
(b) decomposers
(c) insects
(d) micro-organisms
Ans: (d)
Micro-organisms cannot be seen with naked eyes.

Q23. Plants given out during photosynthesis:
(a) oxygen
(b) carbon dioxide
(c) humus
(d) microorganism
Ans: (a)
Plants given out oxygen during photosynthesis.