Class 7 Science Chapter 17 MCQ (Multiple Choice Questions) of Forests: Our Lifeline with explanation and answers of each questions updated for academic session 2022-2023. All the MCQ tests are prepared from latest NCERT Textbooks based on new CBSE Syllabus. These MCQ online tests are important for school unit test as well as terminal or final exams. Class 7 science chapter 17 MCQs cover all the concepts of the chapter.

Class 7 Science Chapter 17 MCQ for 2022-2023

Class: 7Science
Chapter: 17Forests: Our Lifeline
Contents: MCQ Online Tests With Answers

MCQ Tests with Answers for Class 7 Science Chapter 17


Which of the following serve as green lungs?

[A]. Green pigment of the plants
[B]. Forests
[C]. Kitchen Gardens
[D]. Greenhouses gases

Boojho visited a forest near his town with his classmates and his teacher. As they were entering the forest, their class teacher told them not to make noise in the forest as in noise disturb the:

[A]. Birds
[B]. Animals
[C]. Both (a) and (b)
[D]. Plants

Micro-organism act upon the dead plants to produce:

[A]. Sand
[B]. Mushroom
[C]. Humus
[D]. Wood

Which among the following forest animal is the smallest?

[A]. Fox
[B]. Boar
[C]. Bison
[D]. Porcupine

Paheli is writing some statements, choose the incorrect statement and help her:

[A]. A forest acts as the purifier of air and water.
[B]. The forest provides a home for many plants’ animals and decomposers organisms.
[C]. The forest also contains decomposers organisms such as bacteria and fungi.
[D]. None of the above.

Which of the following is not prepared from the wood obtained from forest?

[A]. Paper
[B]. Thermocol
[C]. Matchsticks
[D]. Plywood

Which of the following statements is not correct?

[A]. Forests protect the soil from erosion
[B]. Plants and animals in a forest are not dependent on one another
[C]. Forests influence the climate and water cycle
[D]. Soil helps forests to grow and regenerate

Which of the following is not the name of a tree?

[A]. Teak
[B]. Sal
[C]. Porcupine
[D]. Kachnar

Which types of organism always occurs at the first step in every food chain?

[A]. Heterotroph
[B]. Autotroph
[C]. Saprotroph
[D]. Scavenger

Which of the products is not obtained from a forest?

[A]. Honey
[B]. Catechu
[C]. Gum
[D]. Ginger

One of the following is not produced by the action of decomposers on the dead parts of plants and dead bodies of animals. This one is:

[A]. Carbon di oxide
[B]. Oxygen
[C]. Water
[D]. Nutrients

Forests are not responsible for:

[A]. Providing medicinal plants
[B]. Maintaining the flow of water into the streams
[C]. Creating for flood conditions
[D]. Absorbing rainwater and maintaining water table

Which of the following is not a function of the forests?

[A]. Maintenance of water cycle
[B]. Bringing sufficient rains
[C]. Preventing flash floods
[D]. Causing soil erosion

Which of the following is not a scavenger?

[A]. Crow
[B]. Jackal
[C]. Lion
[D]. Vulture

In a quiz competition, you are asked a question where you have to choose the statement which is/ are correct?

[A]. The various components of a forest are interdependent on one another.
[B]. An ecosystem is a self-sufficient unit of living things and non-living environment needing only the input of sunlight energy for its functioning
[C]. If we remove all the snakes from a forest then all the food chains in which snakes take part will be broken or affected.
[D]. All the above.

In a science quiz competition, Payel are asked a question where she had to choose the statement which was/were incorrect?

[A]. The branchy part of a tree above the stem is known as the crown of the tree.
[B]. The layer of vegetation in a forest which is just below the canopy is called under story.
[C]. The uppermost branches and leaves of tall trees which act like a roof over the forest ground is called canopy.
[D]. None of the above.

Which of the following is not a function of the crowns of forest trees during the daytime?

[A]. Absorb sun’s light energy
[B]. Absorb oxygen from air
[C]. Carry out photosynthesis
[D]. From a green cover

Which of the following do not help the flowering plants of a forest in pollination?

[A]. Honeybees
[B]. Butterflies
[C]. Kingfishers
[D]. Antelopes

Which of the following will help in the conservation of forest?

[A]. Recycling of jute bags
[B]. Recycling of cotton bags
[C]. Recycling of paper bags
[D]. Recycling of plastic bags

If forests disappear:

[A]. Amount of CO2 in air will increase.
[B]. Amount of CO2in air will decrease.
[C]. Amount of O2in air will increase
[D]. Amount of N2 in air will increase

Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. Scavengers are also a type of decomposers.
[B]. Dead animals and plants are the polluted agent of forest.
[C]. The growing of new trees and plants on their own regenerates the forest naturally.
[D]. As a scavenger lion eat up the dead bodies of animals and help in keeping forest environment clean.

Consider the following statements and choose the incorrect one:

[A]. Destruction of forests can change the earth’s climate.
[B]. Destruction of forests leads to the extinction of many wild animals and plants.
[C]. Destruction of forests affects the water cycle leading to reduction in rainfall.
[D]. Destruction of forests will prevent flooding of rivers, loss of life and property.

Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. Forests prevent soil erosion and floods and hence help in the conservation of soil.
[B]. Forests help in maintain water cycle in nature and hence bring sufficient rain.
[C]. Forests also maintain the balance between carbon di oxide and oxygen in the atmosphere.
[D]. None of the above.

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The cutting down of forest or deforestation leads to a decrease in rainfall.
[B]. The removal of fertile top soil from a region by wind, rain or river water is called soil erosion.
[C]. The roots of trees and plants growing in the forest bind the particles of topsoil and hold the soil together firmly.
[D]. None of the above.

In a science quiz competition, Paheli are asked a question where she had to choose the statement which was/were incorrect?

[A]. The various things which are obtained from the forest are called forest products.
[B]. The green plants and trees of the forest release oxygen during the process of photosynthesis.
[C]. Humus mixes up with the soil in the forest and the nutrients present in it are used for the growth of plants.
[D]. Green plants and trees of the forest supply oxygen for breathing and respiration, so forests are known as blue lungs.

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