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Matter in our surroundings - PowerPoint Presentation, Science, Class IX - Class 9 PDF Download

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FAQs on Matter in our surroundings - PowerPoint Presentation, Science, Class IX - Class 9

1. What is matter?
Ans. Matter is anything that occupies space and has mass. It can be defined as anything that has weight and volume.
2. What are the three states of matter?
Ans. The three states of matter are solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a fixed volume but no fixed shape, and gases have no fixed shape or volume.
3. What is the melting point of a substance?
Ans. The melting point of a substance is the temperature at which it changes from a solid to a liquid. It is a physical property of matter and is different for different substances.
4. What is evaporation?
Ans. Evaporation is the process by which a liquid changes into a gas or vapor at a temperature below its boiling point. It occurs when the surface molecules of a liquid gain enough energy to escape into the air as a gas.
5. What is sublimation?
Ans. Sublimation is the process in which a solid directly changes into a gas without passing through the liquid state. It occurs when the molecules of a solid gain enough energy to break away from their fixed positions and escape into the air as a gas.
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