Forests: Our Lifeline – Chapter 17: Class 7 Science NCERT Book (PDF)

Chapter 17 (Forests: Our Lifeline) of Class 7 Science NCERT Book (PDF) is available here for download in PDF format. Download now and prepare for CBSE Class 7th Science exam.

Chapter 17 (Forests: Our Lifeline) of Class 7 Science NCERT Book (PDF) is available here for download in PDF format. Download now & prepare for CBSE Class 7 Science exam in academic session 2021-22. It is one of the most important chapters of the CBSE Class 7th Science NCERT textbook & many essential questions are framed from this chapter.

Download Forests: Our Lifeline – Chapter 17: Class 7 Science NCERT Book (PDF)

Snapshot from Chapter 17 of Class 7 Science NCERT Textbook:

Important topics of this chapter:

Canopy

Crown

Decomposers

Seed dispersal

Soil erosion

Understorey

Deforestation

Humus

Regeneration

Important points of this chapter:

We get various products from the forests surrounding us.

Forest is a system comprising various plants, animals & microscopes.

In a forest, trees form the uppermost layer, followed by shrubs.

The herbs form the lowest layer of vegetation.

Different layers of vegetation provide food and shelter for animals, birds & insects.

The various components of the forest are interdependent on one another.

The forest keeps on growing and changing & can regenerate.

In the forest, there is an interaction between soil, water, air & living organisms.

Forests protect the soil from erosion.

Soil helps forests to grow & regenerate.

Forests are the lifeline for forest-dwelling communities.

Forests influence climate, water cycle & air quality.

Some important questions:

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

Explain how forests prevent floods.

What are decomposers? Name any 2 of them. What do they do in the forest?

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

Explain why there is no waste in a forest.

List five products we get from forests?

Download NCERT Book (PDF) Class 7 Science Forests: Our Lifeline

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