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Class 8 -> Social Science -> Chapter 1: Natural Resources and Their Use (New Course)
I. Chapter Summary:
This chapter introduces the concept of natural resources, their types, and their importance in human life. It explains how resources like water, soil, forests, minerals, and energy resources are used by humans for survival and development. The chapter highlights the difference between renewable and non-renewable resources and emphasizes the need for conservation and sustainable use of resources. It also discusses how overuse and misuse of resources lead to environmental problems and the importance of responsible usage.
II. Key Concepts Covered:
What are Natural Resources?
- Natural resources are materials provided by nature that are useful to humans.
- Examples include air, water, soil, forests, minerals, and sunlight.
Types of Natural Resources:
- Renewable Resources:
- Resources that can be replenished naturally in a short time.
- Examples: Sunlight, wind, water, forests.
- These resources are considered sustainable if used properly.
- Non-Renewable Resources:
- Resources that take millions of years to form and cannot be replaced quickly.
- Examples: Coal, petroleum, natural gas, minerals.
Classification Based on Origin:
- Biotic Resources: Obtained from living organisms (e.g., plants, animals).
- Abiotic Resources: Obtained from non-living things (e.g., air, water, minerals).
Major Natural Resources and Their Use:
- Water:
- Used for drinking, agriculture, industry, and electricity generation.
- Freshwater is limited, so conservation is essential.
- Soil:
- Important for agriculture and plant growth.
- Soil fertility must be maintained through proper practices.
- Forests:
- Provide timber, medicines, oxygen, and habitat for wildlife.
- Help in maintaining ecological balance.
- Minerals:
- Used in industries, construction, and manufacturing.
- Examples: iron, copper, gold.
- Energy Resources:
- Conventional: Coal, petroleum.
- Non-conventional: Solar, wind, hydro energy.
Conservation of Natural Resources:
- Conservation means protecting and using resources wisely.
- Methods include:
- Reduce, Reuse, Recycle (3Rs)
- Afforestation (planting trees)
- Water conservation techniques
- Using renewable energy sources
Sustainable Development:
- Development that meets present needs without harming future generations.
- Focuses on balanced use of resources and environmental protection.
Environmental Issues:
- Overuse of resources leads to:
- Deforestation
- Soil erosion
- Water scarcity
- Pollution
- Climate change
III. Important Questions:
(A) Multiple Choice Questions (MCQs) (1 Mark):
- Which of the following is a renewable resource?
- a) Coal
- b) Petroleum
- c) Sunlight
- d) Natural gas
- Answer: c) Sunlight (PYQ: 2020)
- Which resource is essential for agriculture?
- a) Air
- b) Soil
- c) Minerals
- d) Sunlight
- Answer: b) Soil (PYQ: 2021)
- The 3Rs stand for:
- a) Reduce, Rebuild, Restore
- b) Reduce, Reuse, Recycle
- c) Reuse, Repair, Return
- d) Reduce, Return, Recycle
- Answer: b) Reduce, Reuse, Recycle
- Which of the following is a non-renewable resource?
- a) Wind
- b) Water
- c) Forest
- d) Coal
- Answer: d) Coal
(B) Short Answer Questions (2/3 Marks):
- What are natural resources? Give examples.
- Differentiate between renewable and non-renewable resources.
- Why is water conservation important?
- What is meant by sustainable development?
(C) Long Answer Questions (5 Marks):
- Explain the different types of natural resources with examples.
- Discuss the importance of forests in maintaining ecological balance.
- Describe the methods used for the conservation of natural resources.
- Explain the impact of overuse of resources on the environment.
(D) HOTS (Higher Order Thinking Skills) Questions:
- If natural resources are continuously overused, what will be the long-term effects on human life and the environment?
- How can individuals contribute to the conservation of natural resources in their daily lives?
IV. Key Formulas/Concepts:
- Natural Resources: Materials obtained from nature used by humans.
- Renewable Resources: Resources that can be replenished naturally.
- Non-Renewable Resources: Resources that cannot be replaced quickly.
- Sustainable Development: Balanced use of resources for present and future.
- 3Rs Principle: Reduce, Reuse, Recycle.
V. Deleted Portions (CBSE 2025-2026 as per rationalization of NCERT books):
No portions have been deleted from this chapter as per the rationalized NCERT textbooks.
VI. Chapter-Wise Marks Bifurcation (Estimated – CBSE 2025-2026):
| Unit/Chapter | Estimated Marks | Type of Questions Typically Asked |
|---|---|---|
| Chapter 1: Natural Resources and Their Use | 6-8 Marks | MCQs, Short Answer, Long Answer, Case-based |
VII. Previous Year Questions (PYQs):
- 2019 (1 Mark): What is a renewable resource?
- 2020 (3 Marks): Explain the importance of forests.
- 2021 (5 Marks): Discuss sustainable development with examples.
VIII. Real-World Application Examples to Connect with Topics:
- Rainwater Harvesting: Helps conserve water for future use.
- Solar Energy Use: Reduces dependence on fossil fuels.
- Waste Recycling: Reduces pollution and saves resources.
IX. Student Tips & Strategies for Success (Class-Specific):
- Time Management: Divide topics into types of resources, uses, and conservation methods.
- Exam Preparation: Focus on definitions, examples, and differences (renewable vs non-renewable).
- Stress Management: Relate concepts to daily life like saving water or planting trees.
X. Career Guidance & Exploration (Class-Specific):
For Class 8, focus on awareness:
- Fields related to this topic:
- Environmental Science
- Agriculture
- Geography
- Sustainability Studies
- Future careers:
- Environmentalist
- Forest Officer
- Agricultural Scientist
XI. Important Notes:
- Natural resources are limited, so use them wisely.
- Always follow the principle of Reduce, Reuse, Recycle.
- Refer to the official CBSE website for latest updates.
- Focus on conceptual understanding rather than rote learning.