NCERT Solutions for Class 7 Science Chapter 17 Forests: Our Lifeline - Free PDF Download
1. Explain how animals dwelling in the forest help it grow and regenerate.
Ans: Forest animals aid in the dispersal of plant seeds. The seed can be fertilized with animal excrement, and the seedlings can grow into plants. Squirrels, bats, and other animals, for example, contribute to seed dissemination.
2. Explain how forests prevent floods.
Ans: Trees help to safeguard the environment in a variety of ways, one of which is flood protection. Without trees, direct heavy rains can deplete the soil and produce flooding, as well as soil erosion. However, tree roots hold the soil underneath and prevent soil erosion. As a result, trees and forests contribute to the prevention of floods in the natural world.
3. What are decomposers? Name any two of them. What do they do in the forest?
Ans: Decomposers degrade substances for sustenance and nutrition, as the name implies. Decomposers, in general, are microbes that break down dead plants and animals to offer and receive nutrients. Fungi and bacteria are two examples of microorganisms.
4. Explain the role of forests in maintaining the balance between oxygen and carbon dioxide in the atmosphere.
Ans:
Maintaining of Oxygen and Carbon Dioxide in Atmosphere
Plants utilize carbon dioxide for photosynthesis and then release oxygen, as we all know. Animals breathe this oxygen and exhale carbon dioxide. The plants then use carbon dioxide, continuing the cycle. As a result, forests contribute to the maintenance of the oxygen-carbon dioxide balance in the atmosphere.
5. Explain why there is no waste in a forest.
Ans: In forests, everything is reused and repurposed. Decomposers are essential in the decomposition of garbage (dead plants or animals). The decomposed trash can be utilized as fertilizer for the development of trees. As a result, there is no waste in the forest.
6. List five products we get from forests?
Ans: Products we acquire from forests include:
Honey
Rubber
Wood
Medicinal herbs
Oils
7. Fill in the blanks:
Ans:
Herbs from the ground layer in the forest.
A forest is a purifier of air and water.
The decaying leaves and animals dropping in a forest enrich the humus.
The insects, butterflies, honey bees, and birds help flowering plants in pollination.
8. Why should we worry about the conditions and issues related to forests far from us?
Ans: Nature has given trees as the biggest gift to all animals on the earth. They contribute to air filtration and the water cycle's continuation. Forests provide us with a variety of products that we use every day. As a result, we should be concerned about the state of a forest that is far away from us.
9. Explain why there is a need for a variety of animals and plants in a forest.
Ans: It all starts from the food chain. The preservation and survival of a healthy food chain necessitates a diverse range of creatures. Various insects, for example, eat a variety of plants, and those insects are devoured by frogs. The frogs are devoured by snakes, who are eventually eaten by eagles. Everything is interconnected, and each organism has a predator and prey. This is one of several interwoven food chains seen in nature. If one component of the food chain is disrupted, it will have an influence on the others. And a diverse range of plants and animals are required to keep all of these food chains afloat.
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.
Ans:
Atmospheric Components
11. Which of the following is not a forest product?
(i) Gum
(ii) Plywood
(iii) Sealing wax
(iv) Kerosene
Ans: (iv) Kerosene is not a product of the forest. Kerosene is an organic product obtained from the process of distillation of crude oil.
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.
Ans:
(ii) Plants and animals in a forest are not dependent on one another. This is not the right statement as plants and animals are interdependent on each other to fulfill their requirements of growth and development.
13. Microorganisms act upon the dead plants to produce.
(i) Sand
(ii) Mushrooms
(iii) Humus
(iv) Wood
Ans: (iii) Humus. Humus is an organic product formed from leaf litter produced in the soil by the process of microbial decomposition.
NCERT Solutions Class 7 Science Chapter 17 - PDF Download
The PDF of NCERT solutions for Class 7 Science Chapter 17 offers a comprehensive explanation of the topic "Forest: Our Lifeline." The detailed review includes answers to all exercises, crafted by expert Science teachers nationwide, facilitating an easier learning process. Students struggling with the understanding of Class 7 Chapter 17 can benefit from this PDF, providing a simplified grasp of the topic. Moreover, it presents potential exam questions for CBSE Class 7 Science assessments, serving as a valuable resource for effective exam preparation at any time.
NCERT Solution of Class 7th Science Chapter 17 Forest: Our Lifeline
NCERT solution for Class 7th Science Chapter 17 gives a detailed and proper explanation and overview of the Science Chapter 17 Forest: Our Lifeline. This solution not only makes it easy for the students to understand, but it also reduces the fear of exams. It builds a feeling of self-confidence among the students. The NCERT solution of Science Class 7 Chapter 17 is the key to secure excellent marks as it comes with most of the probable questions that might come in the exams.
Class 7, Chapter 17 of Science, titled "Forest: Our Lifeline," explores the state of forest lands in our country. It emphasizes the significance of forests in our lives, shedding light on the repercussions of forest depletion on both the environment and human well-being. The chapter unfolds through a field visit to a forest, enabling students to discover the diverse array of plants and animals inhabiting these vital ecosystems. Forests help in maintaining a balance in nature. They have a very important role to play in human lives, and this chapter Forest: Our Lifeline brings the importance of forests to our notice. Forests have different kinds of species that play important role in maintaining the food chain in the forest. The plants in forests are of different kinds such as Medicinal plants, wood and timber. The forest products help to maintain the living standard of human beings. Forests serve as an important habitat to many flora and fauna species and NCERT Class 7 Science Chapter 17 Forest: Our Lifeline explains the importance of these forest covers.
The Class 7 Chapter 17 Science also brings out the effects of deforestation or depletion of forest cover. It depicts how rapid urbanization depletes forest covers and how the animals in that forest suffer. The chapter shows the effects of population growth and rapid construction on forest and environment. With all these things, the chapter also provides certain ways to conserve the forest and maintain a balance in nature.
The NCERT solution of Class 7th Science Chapter 17 guarantees the best result in your school examinations, and it always maintains 100% accuracy.
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Conclusion
The NCERT Solutions for 7 Science Chapter 17 - Forests: Our Lifeline, provided by Vedantu, is a valuable tool for class 7 students. It helps introduce Science concepts in an accessible manner. The provided solutions and explanations simplify complex ideas, making it easier for class 7 students to understand the material. By using Vedantu's resources, Students can develop a deeper understanding of NCERT concepts. These solutions are a helpful aid for class 7 students, empowering them to excel in their studies and develop a genuine appreciation for Forests: Our Lifeline.
NCERT Solutions Class 7 Science Chapters
FAQs on NCERT Solutions for Class 7 Science Chapter 17 - Forests: Our Lifeline
1. What are the Roles of Plants and Animals in the Regeneration of Forests?
Forests include different species of plants and animals and these plants and animals are held responsible for the growth and regeneration of forest covers. The animals and microorganisms contribute the utmost in the process of forest regrowth in the following ways:
The micro-organisms in the soil help in converting the dead remains of plants and other animals into humus which contributes to the soil fertility and helps in the growth of new plants.
Animals living in the forest help in seed dispersal of some plants which helps in the growth of new plants and expands the forest cover.
2. Explain How Forests Help in Maintaining the Oxygen Level in the Environment.
The plants are generally considered as a natural air purifier. The plants require carbon dioxide to prepare their food. So, they absorb the carbon dioxide released from humans and animals, and in return, plants provide oxygen as an end product of photosynthesis. This oxygen is released into the atmosphere, thereby maintaining a balance of oxygen and carbon dioxide in the atmosphere. The depletion of forest covers from the earth can be harmful as it can reduce the level of oxygen in the atmosphere.
3. What is Chapter 17-Forest: our lifeline of Class 7 Science about?
Chapter 17 of the Class 7 Science Forest: Our Lifeline is concerned with the state of our country's forest areas. It emphasises the significance of trees in our lives while simultaneously depicting the negative consequences of forest depletion on the ecosystem and human lives. This chapter is based on a field trip to a forest, where students learn about the many flora and creatures that live in the woods. Forests contribute to the preservation of natural equilibrium. Forests serve a critical part in human life, and this chapter, Forest: Our Lifeline, emphasises their significance.
4. Why are forests also known as our lifeline?
Forests aid in the preservation of natural equilibrium. They play a crucial part in people's lives, and this chapter emphasises the value of forests. Forests are home to a variety of species that play a vital part in maintaining the forest's food chain. Forests include a variety of species, including medicinal herbs, wood, and lumber. Forest products aid in the maintenance of human living standards. Many flora and animal species rely on forests for their survival, and NCERT Class 7 Science Chapter 17 discusses the importance of these forest coverings.
5. What are decomposers?
Decomposers are the microorganisms that transform dead plants and animals into humus. In the forest, these microorganisms perform an essential function. Paheli soon removed some dead leaves and noticed a layer of humus on the forest floor beneath them. The nutrients from dead plants and animals have been released into the soil thanks to the presence of humus. These nutrients are then absorbed once more by the roots of live plants.
6. Why is there no waste in a forest according to Chapter 17 of Class 7 Science?
Everything is reused and recycled in forests. Decomposers are necessary for trash breakdown (dead plants or animals). Decomposed garbage can be used as a fertiliser to aid in the growth of trees. As a result, the forest is devoid of waste. Decomposers, as the name indicates, decompose things for nourishment and nutrition. In general, decomposers are microorganisms that break down dead plants and animals in order to provide and absorb nutrients. Microorganisms include fungi and bacteria, for example.
7. What are the benefits of NCERT Solutions for Chapter 17 of Class 7 Science?
NCERT answers for Class 7 Science Chapter 17 has solutions to all the questions of NCERT textbook. It also includes several solved examples to help students finish the chapter. This answer instills confidence in the pupils and helps them comprehend the chapter better. NCERT Solutions for Class 7 Science Chapter 17 gives a comprehensive review of the chapter as well as a simple explanation. It contains answers to all of the questions posed in the exercise, as well as some example questions that may appear in examinations. These answers have been produced by some of India's most experienced Science instructors. And these answers are available on Vedantu’s official website (vedantu.com) and mobile app free of cost.