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

Q1: Name the resource that serves as green lungs and water purifying systems in nature.
Ans: Forest

Q2: What is the topmost layer of the forest called?
Ans: Layer of Emergence

Q3: Which forest layer forms a thick roof that blocks sunlight?
Ans: Canopy

Q4: What is the layer beneath the canopy called?
Ans: Understory

Q5: What is the bottom-most layer of a forest called?
Ans: Forest Floor

Q6: Name the dark substance formed by decaying plant and animal matter.
Ans: Humus

Q7: Which organisms break down dead matter in the forest?
Ans: Decomposers

Q8: Name the upper part of a tree that includes its branches and leaves.
Ans: Crown

Q9: What is the process of cutting down forests called?
Ans: Deforestation

Q10: What is the process by which seeds are spread called?
Ans: Seed dispersal

Q11: What do we call the process of forest recovery after disturbance?
Ans: Regeneration

Q12: Which organisms are the producers in a food chain?
Ans: Plants

Q13: What do we call animals that eat only plants?
Ans: Herbivores

Q14: What are animals called that eat other animals?
Ans: Carnivores

Q15: Name the living things that recycle nutrients back into the soil.
Ans: Decomposers

Q16: What is a simple chain that shows who eats whom in an ecosystem?
Ans: Food Chain

Q17: What do you call a network of interconnected food chains?
Ans: Food Web

Q18: What is the source of energy for all food chains?
Ans: Sunlight

Q19: Which tree is commonly found in forests and used for furniture?
Ans: Teak

Q20: What is the act of planting trees in deforested areas called?
Ans: Reforestation

Q21: Which forest layer supports many birds and insects due to sunlight?
Ans: Layer of Emergence

Q22: What is the shady layer where small plants and shrubs grow?
Ans: Understory

Q23: What role do forests play in the water cycle?
Ans: Rainwater absorption

Q24: Which layer contains fallen leaves and organic matter?
Ans: Forest Floor

Q25: What causes soil erosion when forests are cut down?
Ans: Loss of tree roots

Q26: Which animals help with seed dispersal?
Ans: Birds and animals

Q27: What is the meaning of biodiversity in forests?
Ans: Variety of living organisms

Q28: Which gas do trees absorb from the atmosphere?
Ans: Carbon dioxide

Q29: Which gas do forests release that supports life?
Ans: Oxygen

Q30: Why are forests called dynamic living entities?
Ans: Because they are full of life and activity