Class 9 Exam > Class 9 Videos > Science Class 9 > What is Matter?
What is Matter? Video Lecture | Science Class 9
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FAQs on What is Matter? Video Lecture - Science Class 9
| 1. What is matter? |  |
Ans. Matter is anything that occupies space, has mass, and is perceived by our senses. It is made up of atoms and molecules that are constantly moving and interacting with each other.
| 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 take the shape of their container, and gases have neither a fixed shape nor volume.
| 3. How can matter be classified? | |
Ans. Matter can be classified into two types - pure substances and mixtures. Pure substances are further classified into elements and compounds. Mixtures are classified into homogeneous and heterogeneous mixtures.
| 4. What is the difference between an element and a compound? | |
Ans. An element is a substance made up of only one type of atom. It cannot be broken down into simpler substances by chemical means. A compound, on the other hand, is a substance made up of two or more different types of atoms chemically bonded together. It can be broken down into simpler substances by chemical means.
| 5. How does temperature affect the state of matter? | |
Ans. Temperature affects the state of matter by affecting the kinetic energy of the particles. When the temperature of a substance is increased, the particles move faster and have more kinetic energy. This causes them to overcome the intermolecular forces holding them together, leading to a change in state. For example, when a solid is heated, it melts and becomes a liquid, and when a liquid is heated, it vaporizes and becomes a gas.
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Nov 23, 2024 Last updated |
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