Online Test — Forests — Our Lifeline
25 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 25
A forest is a large area covered mainly with:
Water
Trees
Sand
Rocks
Explanation: A forest is a large area covered mainly with trees and other plants.
Question 2 of 25
The topmost layer of a forest, formed by the crowns of the tallest trees, is the:
Forest floor
Canopy
Understorey
Shrub layer
Explanation: The canopy is the topmost layer formed by the crowns of the tallest trees.
Question 3 of 25
The ground level of a forest, covered with herbs and fallen leaves, is the:
Canopy
Understorey
Forest floor
Shrub layer
Explanation: The forest floor is the lowest layer, with herbs, grasses, and fallen leaves.
Question 4 of 25
A forest is best described as a:
Collection of only trees
Living community of plants and animals
Lifeless area
Single plant
Explanation: A forest is a living community of many interdependent plants and animals.
Question 5 of 25
A single forest can support a great variety of animals because its layers provide different:
Living spaces
Colours
Temperatures only
Sounds
Explanation: Each layer provides a different living space, supporting varied animals.
Question 6 of 25
A food chain always begins with:
Carnivores
Green plants (producers)
Herbivores
Decomposers
Explanation: Green plants are producers and form the start of every food chain.
Question 7 of 25
An animal that eats only plants is called a:
Carnivore
Herbivore
Producer
Decomposer
Explanation: A herbivore is a plant-eating animal, like a deer or rabbit.
Question 8 of 25
In the food chain grass → deer → tiger, the tiger is a:
Producer
Herbivore
Carnivore
Decomposer
Explanation: The tiger eats other animals, so it is a carnivore.
Question 9 of 25
Many food chains linked and crossing one another form a:
Food web
Single chain
Canopy
Layer
Explanation: Many interlinked food chains form a food web.
Question 10 of 25
The arrows in a food chain point in the direction of the flow of:
Water
Food and energy
Air
Sunlight
Explanation: Arrows show the flow of food and energy from the eaten to the eater.
Question 11 of 25
Organisms that break down dead plants and animals into simpler substances are:
Producers
Decomposers
Herbivores
Carnivores
Explanation: Decomposers feed on dead matter and break it down into simpler substances.
Question 12 of 25
Decomposers are mainly:
Trees and shrubs
Fungi and bacteria
Deer and tigers
Birds
Explanation: Decomposers are mainly fungi and bacteria (microorganisms).
Question 13 of 25
The dark, nutrient-rich material formed from decomposed matter is called:
Humus
Sand
Clay
Pollen
Explanation: Humus is the nutrient-rich material formed by decomposers, enriching the soil.
Question 14 of 25
Decomposers are called nature's recyclers because they:
Make food
Return nutrients to the soil
Eat only plants
Block sunlight
Explanation: They return nutrients from dead matter to the soil to be reused.
Question 15 of 25
Without decomposers, the forest soil would gradually:
Become more fertile
Lose its nutrients
Stay the same forever
Turn into rock
Explanation: Without decomposers, nutrients would not return, so the soil would lose fertility.
Question 16 of 25
Forests are called the "lungs of the Earth" because they:
Store water
Release oxygen and absorb carbon dioxide
Make soil
Block rain
Explanation: Forests release oxygen and absorb carbon dioxide, keeping air fit to breathe.
Question 17 of 25
The roots of forest trees help prevent:
Rain
Soil erosion
Photosynthesis
Oxygen release
Explanation: Tree roots hold the soil firmly, preventing soil erosion.
Question 18 of 25
By absorbing carbon dioxide, forests help control the:
Water cycle only
Greenhouse effect (planet warming)
Soil colour
Wind speed
Explanation: Absorbing carbon dioxide helps control the greenhouse effect and warming.
Question 19 of 25
Forests help recharge underground water by letting rainwater:
Evaporate at once
Soak slowly into the ground
Run off quickly
Turn into oxygen
Explanation: Forests let rainwater soak into the ground, recharging underground water.
Question 20 of 25
Which of the following is a useful product obtained from forests?
Plastic
Medicines
Petrol
Glass
Explanation: Forests provide medicines, along with wood, honey, fruits, and other products.
Question 21 of 25
The large-scale cutting down of trees and clearing of forests is called:
Afforestation
Deforestation
Conservation
Reforestation
Explanation: Deforestation is the large-scale cutting and clearing of forests.
Question 22 of 25
Which of the following is a harmful effect of deforestation?
More oxygen
Increased soil erosion
More rainfall
Healthier wildlife
Explanation: Without tree roots, soil erosion increases and fertile land is lost.
Question 23 of 25
Planting new trees to grow forests is called:
Deforestation
Afforestation
Erosion
Pollution
Explanation: Afforestation is the planting of new trees to grow forests.
Question 24 of 25
Protecting wildlife is helped by setting up:
Factories
National parks and sanctuaries
Roads
Mines
Explanation: National parks, sanctuaries, and reserves protect wildlife and forests.
Question 25 of 25
Recycling paper helps conserve forests because paper is made from:
Plastic
Trees (wood)
Sand
Metal
Explanation: Paper is made from trees, so recycling paper reduces the cutting of trees.