Topic Details (Notes format)

Matter in Our Surroundings

Subject: General Science

Book: NCERT Science Class 9

Everything around us is made of matter.
- **States of Matter**:
- Solid, Liquid, Gas.
- **Properties of Matter**:
- Can change state with temperature and pressure.
- **Processes**:
- Evaporation: Liquid to gas.
- Condensation: Gas to liquid.
- Sublimation: Solid to gas without turning into liquid.

**Possible Exam Questions:**
1. Define matter and its states.
2. What are the factors affecting evaporation?
3. Explain the concept of sublimation with examples.
4. How do temperature and pressure affect the state of matter?
5. Why do gases have neither fixed shape nor fixed volume?

Practice Questions

Which of the following is a fundamental force in nature?

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What is the unit of electrical resistance?

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Which gas is released during photosynthesis?

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Which planet has the strongest gravitational force?

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Which process describes the splitting of a nucleus into smaller nuclei?

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What is the chemical formula of water?

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What is the chemical formula for carbon dioxide?

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Which organelle is known as the "powerhouse of the cell"?

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Which component of blood carries oxygen?

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Which process separates light into its component colors?

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