NCERT Solutions Class 7 Science Chapter 17 Forests Our Lifeline

NCERT Solutions Class 7 Science Chapter 17 Forests Our Lifeline have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 7 Science have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 7 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 7 Science are an important part of exams for Class 7 Science and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 7 Science and also download more latest study material for all subjects. Chapter 17 Forests Our Lifeline is an important topic in Class 7, please refer to answers provided below to help you score better in exams

Chapter 17 Forests Our Lifeline Class 7 Science NCERT Solutions

Class 7 Science students should refer to the following NCERT questions with answers for Chapter 17 Forests Our Lifeline in Class 7. These NCERT Solutions with answers for Class 7 Science will come in exams and help you to score good marks

Chapter 17 Forests Our Lifeline NCERT Solutions Class 7 Science

 

NCERT Solutions for Class 7 Science for chapter 17 Forests Our Lifeline

Exercises

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

Answer

Animals dwelling in the forest help in various way for growth and regenerate. Some of them are:
(i) Herbivores animals clear the land by eating grass for the new growth of vegetation.
(ii) Animals also help in the seed dispersal and pollination.
(iii) Dead and decaying bodies of animals convert to humus after decomposition which increase the fertility of the soil of the forest.
(iv) Dungs of animals provide nutrient to various types of seedling to grow.

2. Explain how forests prevent floods.

Answer

Forest  acts as a natural absorber of rainwater and allows it to seep. It helps in controlling the flow of water and slows it down which helps in preventing flood. Also, the trees present in the forest prevents the rain from directly hitting the ground and bind the soil together which helps in absorption of the rain water and thus prevent flood.

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

Answer

The micro-organisms which convert the dead plants and animals to humus are known as decomposers. Bacteria and fungi are the two examples of decomposers. They play an important role in the decomposition of dead remains of the plants and animals and converting them to humus which add nutrient to the soil.

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

Answer

Forest play an important role in maintaining the balance between oxygen and carbon dioxide in the atmosphere. The green plants and trees present in the forest take in carbon dioxide which is released by the animals and release oxygen through the process of photosynthesis which are breathe in by the animals and thus maintains the balance between oxygen and carbon dioxide in the atmosphere.

5. Explain why there is no waste in a forest.

Answer

There is no waste in a forest because whatever produced here are utilized by the other organisms or plants for sustainability. Even the waste materials and dead remains which are produced are bodegradable and converted into humus which returns back the nutrient back to the soil.

6. List five products we get from forests?

Answer

Five products we get from forests are:
(i) Wood
(ii) Resins
(iii) Gum
(iv) Honey
(v) Medicines

7. Fill in the blank:
(a) The insects, butterflies, honeybees and birds help flowering plants in ___________ .
(b) A forest is a purifier of _____________ and _______________ .
(c) Herbs form the ______________ layer in the forest.
(d) The decaying leaves and animal droppings in a forest enrich the ______________ .

Answer

(a) The insects, butterflies, honeybees and birds help flowering plants in pollination .

(b) A forest is a purifier of water and air .

(c) Herbs form the lowest layer in the forest.

(d) The decaying leaves and animal droppings in a forest enrich the soil .

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

Answer

We should worry about the conditions and issues related to forests far from us because more or less we are dependent on it because:
(i) The amount of carbon dioxide in air will increase if forest will disappear and thus less oxygen in atmosphere o breathe in.
(ii) There will be more soil erosion and thus increase in floods as soil will not able to hold water.
(iii) Increase in the percentage of carbon dioxide will also leads to global warming.
(iv) Deforestation will endanger our life and environment and also there will be no shelter for animals.
(v) There is also imbalance in nature and thus causing climate changes and less rainfall.

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

Answer

There is a need of variety of animals and plants in a forest as each of them contribute their for maintaining the ecosystem of the forest. It also helps forest in regeneration and growth. Herbivores are needed to eat green plants and to provide food for the carnivores and Carnivores are needed to eat herbivores and check their population. Also, decomposers are needed to maintain the supply of nutrients to the soil and to the growing plants.

10. In Fig. 17.15, 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.

 image


Answer
image

 

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

- (iv) Kerosene

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.

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

13. Micro-organisms act upon the dead plants to produce
(i) sand 
(ii) mushrooms
(iii) humus
(iv) wood
- (iii) humus

 

Chapter 07 Weather, Climate and Adaptations of Animals to Climate
NCERT Solutions Class 7 Science Chapter 7 Weather Climate and Adaptations of Animals to Climate

NCERT Solutions Class 7 Science Chapter 17 Forests Our Lifeline

The above provided NCERT Solutions Class 7 Science Chapter 17 Forests Our Lifeline is available on our website www.studiestoday.com for free download in Pdf. You can read the solutions to all questions given in your Class 7 Science textbook online or you can easily download them in pdf. The answers to each question in Chapter 17 Forests Our Lifeline of Science Class 7 has been designed based on the latest syllabus released for the current year. We have also provided detailed explanations for all difficult topics in Chapter 17 Forests Our Lifeline Class 7 chapter of Science so that it can be easier for students to understand all answers. These solutions of Chapter 17 Forests Our Lifeline NCERT Questions given in your textbook for Class 7 Science have been designed to help students understand the difficult topics of Science in an easy manner. These will also help to build a strong foundation in the Science. There is a combination of theoretical and practical questions relating to all chapters in Science to check the overall learning of the students of Class 7.

 

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