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The Nature of Matter Video Lecture | Chemistry Class 6 ICSE

FAQs on The Nature of Matter Video Lecture - Chemistry Class 6 ICSE

1. What is matter and how is it classified ?
Ans.Matter is anything that occupies space and has mass. It is classified into three main states: solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a fixed shape nor volume, expanding to fill the available space.
2. What are the properties of solids, liquids, and gases ?
Ans.Solids have a definite shape and volume, with particles closely packed in a fixed arrangement. Liquids have a definite volume but take the shape of their container, with particles that are close but can move past one another. Gases have no definite shape or volume; their particles are far apart and move freely, filling the space available.
3. How does temperature affect the state of matter ?
Ans.Temperature can cause changes in the state of matter. For example, heating a solid can cause it to melt into a liquid (melting), while cooling a gas can cause it to condense into a liquid (condensation). Similarly, heating a liquid can cause it to evaporate into a gas (evaporation), and cooling a liquid can turn it into a solid (freezing).
4. What is the difference between physical and chemical changes in matter ?
Ans.Physical changes affect the form of a substance but not its chemical composition, such as changing states (solid to liquid). Chemical changes involve a transformation that alters the substance's chemical structure, resulting in new substances, as seen in reactions like burning or rusting.
5. Can matter change from one state to another ? If so, how ?
Ans.Yes, matter can change from one state to another through processes like melting, freezing, condensation, and evaporation. These changes are influenced by temperature and pressure. For instance, heating ice (solid) causes it to melt into water (liquid), and cooling water can freeze it back into ice.
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