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NCERT solutions Science Textbook for Class 7 chapter 17 Forests: Our Lifeline

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Chapter 17 - Forests: Our Lifeline

Pages 217 - 219

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

Q 1 | Page 217 | view solution

Explain how forests prevent floods.

Q 2 | Page 217 | view solution

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

Q 3 | Page 217 | view solution

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

Q 4 | Page 217 | view solution

Explain why there is no waste in a forest.

Q 5 | Page 217 | view solution

List five products we get from forests.

Q 6 | Page 217 | view solution

Fill in the blank:

The insects, butterflies, honeybees and birds help flowering plants in _______.

Q 7.1 | Page 218 | view solution

Fill in the blank:

A forest is a purifier of _______ and ________.

Q 7.2 | Page 218 | view solution

Fill in the blank:

Herbs form the ________ layer in the forest.

Q 7.3 | Page 218 | view solution

Fill in the blank:

Herbs form the ________ layer in the forest.

Q 7.3 | Page 218 | view solution

Fill in the blank:

The decaying leaves and animal droppings in a forest enrich the _______.

Q 7.4 | Page 218 | view solution

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

Q 9 | Page 218 | view solution

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

Q 9 | Page 218 | view solution

In figure, 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

Q 10 | Page 218 | view solution

Which of the following is not a forest product?

1) Gum

2) Plywood

3) Sealing wax

4) Kerosene

Q 11 | Page 218 | view solution

Which of the following statements is not correct?

1) Forests protect the soil from erosion.

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

3) Forests influence the climate and water cycle.

4) Soil helps forests to grow and regenerate.

Q 12 | Page 218 | view solution

Micro-organisms act upon the dead plants to produce

1) sand

2) mushrooms

3) humus

4) wood

Q 13 | Page 219 | view solution

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