Question

Q4. Answer in brief:

1. If a substance has greater density than water, will it sink or float in water?

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2. What are opaque objects?



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3. In which of these is the distance between molecules the largest-solids, liquids or gases?



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4. Name three materials around you which are transparent in nature.



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5. Why can’t you see properly through Translucent objects?



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6. Radio and TV sets are matter. But the signals they receive are not. Why?



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7. Name the different properties of Matter.



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8. Draw diagrams showing the molecular arrangement of the three states of matter.



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Answer 1

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Answer 2

Answer:1)it will sink because if the substance has higher density than water than the water may not be able to hold it and it would sink

2)opaque objects :the objects which do not reflect light and has a rough surface

3)gas as there are less particles and they have more space in comparison to solid and liquid

4)air,water,clear glass as we can see through them

5)The reflection do not reflect back perfectly and also some of them may scattered that’s why

6)radio and tv has mass and volume but signals have neither mass nor volume