States of Matter

# States of Matter Video Lecture | Science for Class 3

## Science for Class 3

19 videos|48 docs|30 tests

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## FAQs on States of Matter Video Lecture - Science for Class 3

 1. What are the three states of matter?
Ans. The three states of matter are solid, liquid, and gas. In a solid, particles are closely packed together and have a fixed shape and volume. In a liquid, particles are loosely packed and can move around, taking the shape of the container they are in. In a gas, particles are far apart and can move freely, filling the entire space available to them.
 2. How does matter change from one state to another?
Ans. Matter can change from one state to another through the process of heating or cooling. When a solid is heated, it gains energy and its particles start vibrating more, eventually breaking the bonds and turning into a liquid. Further heating converts the liquid into a gas, where the particles move even more freely. On the other hand, cooling a gas causes its particles to lose energy, eventually turning into a liquid and then a solid.
 3. What is melting point and boiling point?
Ans. Melting point is the temperature at which a solid substance changes into a liquid state. It is the point at which the particles in a solid gain enough energy to overcome their attractive forces and start moving freely. Boiling point, on the other hand, is the temperature at which a liquid substance changes into a gas state. It is the point at which the liquid's particles gain enough energy to overcome the forces holding them together and escape into the air.
 4. Can matter exist in a fourth state?
Ans. Yes, matter can exist in a fourth state known as plasma. Plasma is a highly ionized gas consisting of positively charged ions and free electrons. It is typically formed at very high temperatures or under the influence of strong electromagnetic fields. Plasma is commonly found in stars, lightning, and fluorescent lights.
 5. How does the arrangement of particles differ in the three states of matter?
Ans. In a solid, the particles are tightly packed and arranged in a regular pattern, forming a fixed structure. In a liquid, the particles are still close together but can move past each other, allowing the liquid to flow and take the shape of its container. In a gas, the particles are widely spread apart and move randomly in all directions, filling the entire space available to them.

## Science for Class 3

19 videos|48 docs|30 tests

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