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Matter Video Lecture | Science for Grade 7
FAQs on Matter Video Lecture - Science for Grade 7
| 1. What is matter and what are its main properties? |  |
Ans.Matter is anything that has mass and occupies space. The main properties of matter include mass, volume, and density. Mass is the amount of matter in an object, volume is the amount of space it occupies, and density is the mass per unit volume.
| 2. What are the different states of matter? | |
Ans.The three primary states of matter are solids, liquids, and gases. In solids, particles are closely packed and vibrate in place. In liquids, particles are close but can move past each other, allowing liquids to flow. In gases, particles are far apart and move freely, filling the available space.
| 3. How does temperature affect the state of matter? | |
Ans.Temperature can cause matter to change its state. For example, heating a solid can cause it to melt into a liquid, while cooling a gas can cause it to condense into a liquid. This change in state is due to the energy changes in the particles that make up the matter.
| 4. What is the difference between a physical change and a chemical change in matter? | |
Ans.A physical change involves a change in appearance or state without altering the chemical composition of the substance, such as melting ice. A chemical change involves a transformation that results in the formation of new substances, such as rust forming on iron.
| 5. Why is it important to study matter in science? | |
Ans.Studying matter is crucial in science because it helps us understand the physical world and the properties of substances. This knowledge is foundational for various scientific fields, including chemistry, physics, and environmental science, and is essential for developing new materials and technologies.
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Oct 10, 2025
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