WORKSHEET -I CLASS IX

MATTER IN OUR SURROUNDINGS

1. What is matter? What are the physical states of matter?

2. With the help of an activity, show particulate nature of matter.

3. What are characteristics of particles of matter?

4. What is diffusion? Give an example

5.  Why a wooden table should be called solid?

.6. Why can we smell hot food from a distance?

7.  Why can a sponge be compressed though it is a solid?

8. If a bottle of perfume is opened in one corner of a room, it immediately spreads throughout the room. Why?

Answer: The molecules of a gas are free to move in a chaotic motion at a greater speed throughout the vessel  in which it is contained. When the bottle of perfume is opened in one corner of the room, the molecules of perfume move at random  motion in all direction and mix with the molecules of air and  reaches us

9  How can we say that air is a matter?

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