Topic Details (Notes format)

Water: A Precious Resource

Subject: General Science

Book: NCERT Science Class 7

Water is essential for life and must be conserved.
- **Uses of Water**:
- Drinking, agriculture, industry.
- **Water Cycle**:
- Evaporation, condensation, precipitation.
- **Water Scarcity**:
- Overuse, pollution, climate change affect availability.

**Possible Exam Questions:**
1. Explain the steps of the water cycle.
2. Why is water conservation important?
3. How does groundwater depletion affect agriculture?
4. What are the causes of water scarcity?
5. Discuss methods to save water.

Practice Questions

Which gas is used in the process of welding?

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Which gas is most abundant in Earth’s atmosphere?

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Which component of blood carries oxygen?

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Which organelle is responsible for photosynthesis in plants?

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What is the unit of electrical resistance?

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Which metal is liquid at room temperature?

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Which gas is used in fire extinguishers?

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What is the atomic number of hydrogen?

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Which gas is commonly used in balloons to make them float?

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Which part of the plant conducts water?

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