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Forests: Our Lifeline Class 7 Notes CBSE Science Chapter 17 (Free PDF Download)

Last updated date: 13th Jul 2024
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Revision Notes for CBSE Class 7 Science Chapter 17 Forests: Our Lifeline - Free PDF Download

Free PDF download of Class 7 Science Chapter 17 - Forests: Our Lifeline Revision Notes & Short Key-notes prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Register Online for NCERT Solutions Class 7 Science tuition on to score more marks in CBSE board examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions ,they can download Class 7 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations. 

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Access Class 7 Science Chapter 17 - Forests: Our Lifeline Notes


  • A large region of land densely covered in trees, bushes, and other vegetation.

  • The woodlands around us provide us with a variety of items.

  • Forests are made up of a variety of plants, animals, and microorganisms.

  • Trees are found in the uppermost layer of a forest, followed by shrubs, and herbs, which are found in the lowest layer of vegetation.

  • Animals, birds, and insects can find food and refuge in various layers of vegetation.

  • The forest's diverse components are interdependent on one another.

  • The forest continues to grow and change, and it can regenerate.

  • There is interaction between soil, water, air, and live organisms in the forest.

  • Forests help to keep soil from eroding.

  • Soil aids in the growth and regeneration of forests.

  • Forests are essential to the survival of forest-dwelling communities.

  • Forests have an impact on the climate, the water cycle, and air quality.


Deforestation is the process of removing trees from their natural habitat.

Importance of Forests:

  1. Provide timber.

  2. Purify air.

  3. Provide shelter.

  4. Prevent soil erosion.

  5. Control floods.

  6. Noise absorbers.

Independence of Plants and Animals in Forest:

  1. Plants and animals rely on one another in order to survive.

  2. To obtain energy and survive, all organisms interact with one another and their physical surroundings.

Effects of Deforestation:

  1. The amount of carbon dioxide in the atmosphere will rise, causing the earth's temperature to rise. (Climate Change)

  2. Animals shall not be provided with food or shelter.

  3. The soil will be unable to contain water, resulting in flooding.

  4. Put people's lives and the environment in jeopardy.

Conservation of Forests:

  1. Don't let your animals overgraze.

  2. Encourage the planting of trees.

  3. Take care of the environment.

  4. Keep forest fires at bay.

Food Chain:

Interdependence between producers and consumers is investigated using various linkages that resemble a chain or organism interdependence, which reveals who consumes whom.

Food Chain

Food Web:

A system of interconnected food chains that can be used to represent a variety of biological connections.

Key Takeaways from Class 7 Chapter 17 - Forests: Our Lifeline

Explore key takeaways, from being oxygen factories to biodiversity hubs, unveiling the treasures and significance of these natural lifelines for our planet.

1. Life Sustainer: Forests play a vital role in sustaining life on Earth by providing essential resources like oxygen, water, and habitat for diverse plant and animal species.

2. Oxygen Factories: Trees in forests act as nature's oxygen factories, converting carbon dioxide into oxygen through the process of photosynthesis, ensuring a breathable atmosphere.

3. Water Regulators: Forests act as natural water regulators, preventing soil erosion and maintaining water balance by absorbing rainwater and releasing it gradually.

4. Biodiversity Hub: Forests house a rich diversity of flora and fauna, contributing to the ecological balance and providing a habitat for countless species.

5. Resource Treasure: Forests offer valuable resources like timber, medicinal plants, and other forest products, supporting livelihoods and various industries.

6. Climate Stabilizers: Forests play a crucial role in regulating climate by absorbing and storing carbon dioxide, helping mitigate the impacts of climate change.

7. Conservation Call: Understanding the importance of forests encourages responsible practices, emphasizing the need for conservation to protect these lifelines for current and future generations.

Chapter Summary - Forests: Our Lifeline

Class 7 - Forests: Our Lifeline, Chapter 17, unveils the captivating story of Earth's green guardians. These majestic forests emerge as life's essential supporters, providing oxygen, regulating water, and offering a haven for diverse species. Students journey through the pages, discovering the critical roles forests play – from being biodiversity hubs to climate stabilizers. The chapter unfolds the treasure trove of resources within forests, emphasizing responsible conservation. As students delve into the intricate web of nature, they grasp the profound impact of forests on our survival and the urgent need to protect these lifelines for a sustainable future.

What are the Benefits of Referring to Vedantu’s Revision Notes for Class 7 Science Chapter 17 - Forests: Our Lifeline

Vedantu’s Revision Notes for Class 7 Science Chapter 17 - Forests: Our Lifeline: These notes act as invaluable companions, simplifying the intricate wonders of forests and offering a clear understanding of their significance in our lives.

  • Conceptual Summaries: Quickly grasp the crucial concepts of forest ecosystems, discovering the secrets of their role as lifelines on Earth.

  • Simplified Understanding: Navigate through the complexities of forest science, transforming intricate topics into easily digestible insights for better comprehension.

  • Last-Minute Forest Wisdom: An efficient tool for last-minute exam preparations, ensuring a solid understanding of key forest-related principles.

  • Enhanced Memory Retention: Solidify your understanding of crucial information about forests, reinforcing it for effective learning and retention.

  • Strategic Exam Preparation: Guiding you with key points and tips specific to the chapter, ensuring you're well-prepared for your exams.

  • Time-Efficient Learning: Save time by accessing consolidated information, allowing you to focus on mastering the significance of forests as our lifelines efficiently.


For an enhanced comprehension of this subject, NCERT - Class 7 Science Chapter 17 - Forests: Our Lifeline, thoughtfully prepared by experienced educators at Vedantu, is your invaluable companion. These notes break down the complexities of Forests: Our Lifeline into easily digestible sections, helping you grasp new concepts and navigate through questions effortlessly quickly in the last minute as well. By immersing yourself in these notes, you not only prepare for your studies more efficiently but also develop a profound understanding of the subject matter.

FAQs on Forests: Our Lifeline Class 7 Notes CBSE Science Chapter 17 (Free PDF Download)

1. What can I expect while studying from Vedantu’s Revision Notes for Chapter 17 of Class 7 Science?

Ans: When you choose Vedantu's Revision Notes for Class 7 Chapter 17, here is what you can expect to get:

  • Professionally prepared notes listing all the important details of the chapters.

  • Systematically arranged notes in bullet points for ease of understanding containing important topics like deforestation, the importance of forests, effects of deforestation, food chain, food web, etc.

  • Crisp, concise, and uncomplicated notes perfect for quick revision.

  • Easily downloadable notes free of charge.

2. Can Vedantu’s Revision Notes for Chapter 17 of Class 7 Science be accessed offline?

Ans: Yes, you can easily access Vedantu’s Revision Notes for Class 7 Science Chapter 17 offline. Just download them following these easy steps:

  • Click on the link of Revision Notes for Class 7 Science Chapter 17.

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3. How forests are our lifeline?

Ans:  Forests are extremely beneficial to us. They draw in carbon dioxide and give out oxygen. They provide us with several beneficial things like wood, medicinal plants, timber, rubber, etc. they also help in maintaining a flourishing flora and fauna. One of their most important functions is preserving soils. They also help in regulating the climate and bringing in rainfall. Hence they are rightly termed as our lifelines. For more comprehensive information on this topic, refer to the Revision Notes of this chapter.

4. How nutrients are recycled in the forest?

Ans:  Nutrients are recycled in the forest in the following simple manner:

  1. Plants, insects, and microbes absorb nutrients from the soil.

  2. Animals and birds take nutrients from plants or other animals in the forest.

  3. When insects, animals, plants, and birds die in the forest, their bodies decompose by microbes. These decomposing bodies are further turned into organic matter in the soil.

5. How do animals dwelling in the forest help it grow and regenerate?

Ans: Forests are the natural habitat of a diversity of animals and birds. These animals and birds help in regenerating forests in the following ways:

a) Animals and birds dwelling in the forest aid in the dispersal of seeds in   various new places so that new trees can grow in the forest.

b) Dead and decaying animals are converted into nutrient-rich humus in the forest which in turn provides nutrients to the plants.

c) Animal and bird's faecal matter also provides nutrition to growing plants.