Worksheet – Class 8 Science
Chapter 1: Natural Resources and Their Use
Section A – Very Short Answer (1 mark each)
- What is a natural resource?
- What are renewable resources?
- Give one example of a non-renewable resource.
- What is pollution?
- What is afforestation?
- What are the 3 R’s?
- What is rainwater harvesting?
- What is sustainable use of resources?
- Name one ecosystem function.
- What is deforestation?
Section B – Short Answer Questions (2–3 marks each)
- How can overuse make a renewable resource non-renewable? Give one example.
- Explain the importance of air purification by plants.
- What is the difference between renewable and non-renewable resources?
- Write any two actions to conserve natural resources.
- How does pollution affect natural resources?
- What is the role of forests in climate regulation?
Section C – Long Answer Questions (4–5 marks each)
- Explain how renewable resources can become non-renewable with suitable examples.
- Describe any five ecosystem functions that are useful to humans.
- What is sustainable development? Explain with examples.
- Write the importance of afforestation and rainwater harvesting.
- Explain the considerations to keep in mind while producing goods.
Section D – Activity-Based / Case Study Questions
Case Study – 1
Ravi lives in a village where people depend on groundwater for daily use. Over the years, villagers started using more water for farming and household work. They did not take any steps to save water. Slowly, the water level started going down. Wells began to dry up during summer. At the same time, many trees were cut for construction. This reduced rainfall in the area. People now face serious water shortages. The village is planning to take corrective steps.
Questions:
What is the main reason for the falling water level?
How did cutting trees affect water availability?
Suggest two ways to improve the situation.
Name one method to conserve water in villages.
Case Study – 2
In a town, factories were set up near a river. They started releasing waste into the river without proper treatment. The river water became polluted and unsafe. People could not use it for drinking or farming. Fish and other aquatic life began to die. The nearby land also became less fertile. The government later took action to stop pollution. Awareness programs were started to educate people. Now efforts are being made to clean the river.
Questions:
What caused the pollution of the river?
How did pollution affect living organisms?
What steps can industries take to prevent pollution?
Why is clean water important for humans?
Section E – Think and Answer (HOTS)
- Why should we save resources even if they are renewable?
- What will happen if forests are completely destroyed?
- How can students contribute to conserving natural resources?
Section F – Assertion and Reason Questions
1.
Assertion (A): Renewable resources can become non-renewable.
Reason (R): They are used faster than they are replaced.
2.
Assertion (A): Afforestation helps in conserving natural resources.
Reason (R): Trees help maintain rainfall and prevent soil erosion.
Ans:- (a) Both A and R are true and R is the correct explanation of A.
3.
Assertion (A): Pollution makes natural resources unusable.
Reason (R): Polluted air and water are harmful for living beings.
Ans:- (a) Both A and R are true and R is the correct explanation of A
Section G – Fill in the Blanks
- Resources that can be replenished are called __________ resources.
- Cutting down trees is called __________.
- The three R’s are Reduce, Reuse and __________.
- Collecting rainwater is known as __________.
- Coal and petroleum are __________ resources.
Section H – Match the Following
Column A Column B
Renewable resource Coal
Afforestation Planting trees
Pollution Dirty air and water
Rainwater harvesting Saving water
Non-renewable Limited supply
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