Vidaara.orgClass 7 · Mathematics
CodeVID-M7-WS
Forests — Our Lifeline — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
25 × 1 = 25 marks
1.
A forest is a large area covered mainly with:
- A.Water
- B.Trees
- C.Sand
- D.Rocks
2.
The topmost layer of a forest, formed by the crowns of the tallest trees, is the:
- A.Forest floor
- B.Canopy
- C.Understorey
- D.Shrub layer
3.
The ground level of a forest, covered with herbs and fallen leaves, is the:
- A.Canopy
- B.Understorey
- C.Forest floor
- D.Shrub layer
4.
A forest is best described as a:
- A.Collection of only trees
- B.Living community of plants and animals
- C.Lifeless area
- D.Single plant
5.
A single forest can support a great variety of animals because its layers provide different:
- A.Living spaces
- B.Colours
- C.Temperatures only
- D.Sounds
6.
A food chain always begins with:
- A.Carnivores
- B.Green plants (producers)
- C.Herbivores
- D.Decomposers
7.
An animal that eats only plants is called a:
- A.Carnivore
- B.Herbivore
- C.Producer
- D.Decomposer
8.
In the food chain grass → deer → tiger, the tiger is a:
- A.Producer
- B.Herbivore
- C.Carnivore
- D.Decomposer
9.
Many food chains linked and crossing one another form a:
- A.Food web
- B.Single chain
- C.Canopy
- D.Layer
10.
The arrows in a food chain point in the direction of the flow of:
- A.Water
- B.Food and energy
- C.Air
- D.Sunlight
11.
Organisms that break down dead plants and animals into simpler substances are:
- A.Producers
- B.Decomposers
- C.Herbivores
- D.Carnivores
12.
Decomposers are mainly:
- A.Trees and shrubs
- B.Fungi and bacteria
- C.Deer and tigers
- D.Birds
13.
The dark, nutrient-rich material formed from decomposed matter is called:
- A.Humus
- B.Sand
- C.Clay
- D.Pollen
14.
Decomposers are called nature's recyclers because they:
- A.Make food
- B.Return nutrients to the soil
- C.Eat only plants
- D.Block sunlight
15.
Without decomposers, the forest soil would gradually:
- A.Become more fertile
- B.Lose its nutrients
- C.Stay the same forever
- D.Turn into rock
16.
Forests are called the "lungs of the Earth" because they:
- A.Store water
- B.Release oxygen and absorb carbon dioxide
- C.Make soil
- D.Block rain
17.
The roots of forest trees help prevent:
- A.Rain
- B.Soil erosion
- C.Photosynthesis
- D.Oxygen release
18.
By absorbing carbon dioxide, forests help control the:
- A.Water cycle only
- B.Greenhouse effect (planet warming)
- C.Soil colour
- D.Wind speed
19.
Forests help recharge underground water by letting rainwater:
- A.Evaporate at once
- B.Soak slowly into the ground
- C.Run off quickly
- D.Turn into oxygen
20.
Which of the following is a useful product obtained from forests?
- A.Plastic
- B.Medicines
- C.Petrol
- D.Glass
21.
The large-scale cutting down of trees and clearing of forests is called:
- A.Afforestation
- B.Deforestation
- C.Conservation
- D.Reforestation
22.
Which of the following is a harmful effect of deforestation?
- A.More oxygen
- B.Increased soil erosion
- C.More rainfall
- D.Healthier wildlife
23.
Planting new trees to grow forests is called:
- A.Deforestation
- B.Afforestation
- C.Erosion
- D.Pollution
24.
Protecting wildlife is helped by setting up:
- A.Factories
- B.National parks and sanctuaries
- C.Roads
- D.Mines
25.
Recycling paper helps conserve forests because paper is made from:
- A.Plastic
- B.Trees (wood)
- C.Sand
- D.Metal
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Trees
- (B) Canopy
- (C) Forest floor
- (B) Living community of plants and animals
- (A) Living spaces
- (B) Green plants (producers)
- (B) Herbivore
- (C) Carnivore
- (A) Food web
- (B) Food and energy
- (B) Decomposers
- (B) Fungi and bacteria
- (A) Humus
- (B) Return nutrients to the soil
- (B) Lose its nutrients
- (B) Release oxygen and absorb carbon dioxide
- (B) Soil erosion
- (B) Greenhouse effect (planet warming)
- (B) Soak slowly into the ground
- (B) Medicines
- (B) Deforestation
- (B) Increased soil erosion
- (B) Afforestation
- (B) National parks and sanctuaries
- (B) Trees (wood)
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