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

Q1

Which of the following serve as green lungs?

[A]. Green pigment of the plants
[B]. Forests
[C]. Kitchen Gardens
[D]. Greenhouses gases
Q2

Consider the following statements and choose the correct one:

[A]. A forest is a large area of land covered mainly with trees and other plants.
[B]. Due to different climates and soils, there are various types of trees and other plants found in various forests.
[C]. The forest floor provides favorable conditions for seeds to germinate into seedlings and saplings.
[D]. All the above.
Q3

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
Q4

Which of the following is not a forest product?

[A]. Gum
[B]. Plywood
[C]. Sealing wax
[D]. Kerosene
Q5

Which of the following has the strongest stem?

[A]. A tree
[B]. A creeper
[C]. A climber
[D]. A bush
Q6

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

[A]. Paper
[B]. Thermocol
[C]. Matchsticks
[D]. Plywood
Q7

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

[A]. Teak
[B]. Sal
[C]. Porcupine
[D]. Kachnar
Q8

Consider the following statements and choose the incorrect one:

[A]. The plants are called producers.
[B]. The animals are called consumers.
[C]. Saprotrophs are commonly known as decomposers.
[D]. None of the above.
Q9

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

[A]. Heterotroph
[B]. Autotroph
[C]. Saprotroph
[D]. Scavenger
Q10

Which of the products is not obtained from a forest?

[A]. Honey
[B]. Catechu
[C]. Gum
[D]. Ginger
Q11

The branchy part of a tree above the stem is known as:

[A]. Crown
[B]. Canopy
[C]. Sapling
[D]. Humus
Q12

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
Q13

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
Q14

Which of the following is not a scavenger?

[A]. Crow
[B]. Jackal
[C]. Lion
[D]. Vulture
Q15

Read the following sentences carefully, and choose the incorrect one:

[A]. The first step in every food chain is the plants.
[B]. The second step in a food chain is always a herbivore
[C]. The third step in a food chain is always a carnivore.
[D]. Scavengers are referred as decomposers.
Q16

Which of the following help in maintaining the supply of nutrients of the growing plants and trees in a forest?

[A]. Saprotrophs
[B]. Autotrophs
[C]. Carnivores
[D]. Heterotrophs
Q17

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
Q18

Which of the following statement is or are correct?

[A]. The layer of vegetation in a forest which is just below the understorey, is called shrub layer.
[B]. The layer of vegetation in the forest which is just below the shrub layer, is called the herb layer.
[C]. The forest floor is also considered a layer of vegetation in the forest structure.
[D]. All the above.
Q19

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
Q20

State whether the following statements are true or false:

[A]. Forest protects the soil from erosion.
[B]. Forest influence climate, water cycle and air quality.
[C]. The forest keeps on growing and changing and can regenerate.
[D]. In a forest, trees form the uppermost layer, followed by herbs and the shrubs form the lowest layer of vegetation.
Q21

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.
Q22

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.
Q23

In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. [A] Forests help in cleaning air and purifying water.
[B]. Forests provide food, water, shelter and medicine to the forest-dwelling people.
[C]. Forests provide a natural habitat to wild animals and birds and hence help in the conservation of wildlife.
[D]. Cutting down of forests is driving out many populations, which help many people to build houses, factories and bridge etc.
Q24

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.
Q25

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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