NCERT Solutions | Class 7 Science Chapter 17 | Forests: Our Lifeline

CBSE Solutions | Science Class 7

Check the below NCERT Solutions for Class 7 Science Chapter 17 Forests: Our Lifeline Pdf free download. NCERT Solutions Class 7 Science were prepared based on the latest exam pattern. We have Provided Forests: Our Lifeline Class 7 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 7 Science

NCERT Solutions Class 7 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	7th
Subject:	Science
Chapter:	17
Chapters Name:	Forests: Our Lifeline
Medium:	English

Forests: Our Lifeline | Class 7 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 7 Science Chapter 17 Forests: Our Lifeline to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

cbse class 7 science Chapter 17, Question 1.

Explain how animals dwelling in the forest help it grow and regenerate.

cbse science class 7 solutions, Answer :

Animals help in dispersing seeds of certain plants. The decaying animal dung also provides nutrients to the seedling to grow. This is how animals help the forest to grow and regenerate.

cbse class 7 science notes pdf, Question 2.

Explain how forests prevent floods.

ncert class 7 science Chapter 17 question answer, Answer :

Raindrops in a forest do not hit the ground directly. The uppermost layer of the forest canopy intercepts the raindrops, and most of the water comes down up to soil through the branches and the stems of the trees. From the leaves, it drops slowly over the branches of the shrubs and herbs. Thus forests act as a natural absorber of rainwater and allow it to seep and therefore help in controlling floods.

cbse class 7 science syllabus pdf, Question 3.

What are decomposers? Name any two of them. What do they do in the forest?

cbse science class 7 solutions, Answer :

The micro-organisms which convert the dead plants and animals to humus are known as decomposers. Bacteria, mushrooms, etc. are decomposers. They decompose dead organisms and provide nutrients to trees.

cbse science class 7 book, Question 4.

Explain the role of forests in maintaining the balance between oxygen and carbon dioxide in the atmosphere.

ncert class 7 science Chapter 17 question answer, Answer :

Plants release oxygen as a byproduct during the process of photosynthesis. This oxygen is inhaled by animals for respiration. This respiration process releases carbon dioxide which is used again by plants during photosynthesis. In this way, use and consumption of oxygen and carbon dioxide go on. Thus, they maintain the balance of oxygen and carbon dioxide in the atmosphere.
NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline Q.4

NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline Q.4

cbse science class 7 book pdf, Question 5.

Explain why there is no waste in a forest.

cbse science class 7 solutions, Answer :

The decomposers decompose the dead organisms. The decomposed matter is absorbed by plants as nutrients. So, there is no waste in a forest.

cbse science class 7 Chapter 17, Question 6.

List five products we get from forests.

ncert class 7 science Chapter 17 question answer, Answer :

Honey
Wax
Gum
Herbs
Wood.

cbse science class 7 syllabus, Question 7.

Fill in the blanks:

The insects, butterflies, honeybees, and birds help flowering plants in ……..
A forest is a purifier of …….. and ………
Herbs form the ………. layer in the forest.
The decaying leaves and animal droppings in a forest enrich the ………..

cbse science class 7 solutions, Answer :

pollination
air, water
lowest
soil

class 7 science Chapter 17, Question 8.

Why should we worry about the conditions and issues related to forests far from us?

ncert class 7 science Chapter 17 question answer, Answer :

Forests are very helpful for us. They clean air, play a vital role in the water cycle, provide various items, and so on. So, we should worry about the conditions and issues related to forests far from us.

NCERT Class 7 Science book, Question 9.

Explain why there is a need for a variety of animals and plants in a forest.

cbse science class 7 solutions, Answer :

A variety of animals and plants are necessary for their survival and maintenance of the food chain. For example, the grass is eaten by insects, which in turn, are eaten by the frog. The frog is consumed by a snake which is eaten by an eagle. Thus it forms a food chain.
Grass ➜ insects ➜ frog ➜ snake ➜ eagle.
Many food chains can be found in the forest. All food chains are linked together. If anyone’s food chain is disturbed, it affects other food chains. Every part of the forest is dependent on the other parts. If we remove one component, say trees, all other commonest would be affected.

NCERT Class 7 Science book PDF, Question 10.

In Fig., the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels: clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.

ncert class 7 science Chapter 17 question answer, Answer :

NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline Q.10

ncert class 7 science Chapter 17, Question 11.

Which of the following is not a forest product?
(i) Gum
(ii) Plywood
(iii) Sealing wax
(iv) Kerosene

cbse science class 7 solutions, Answer :

(iv) Kerosene.

ncert class 7 science Chapter 17 notes, Question 12.

Which of the following statements is not correct?
(i) Forests protect the soil from erosion.
(ii) Plants and animals in a forest are not dependent on one another.
(iii) Forests influence the climate and water cycle.
(iv) Soil helps forests to grow and regenerate.

ncert class 7 science Chapter 17 question answer, Answer :

(ii) Plants and animals in a forest are not dependent on one another.

NCERT Science book Class 7 Solutions PDF free download, Question 13.

Microorganisms act upon the dead plants to produce
(i) sand
(ii) mushrooms
(iii) humus
(iv) wood

cbse science class 7 solutions, Answer :

(iii) Humus.