Very Short Answer Type Questions
1. What are the conditions for 'something to be called 'matter' ?
2. Name two processes which provide the best evidence for the motion of particles in matter.
3. Which single term is used to describe the mixing of copper sulphate and water kept in a beaker, on its own?
4. When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is
illustrated by this observation ?
5. Even two or three crystals of potassium permanganate can impart colour to a very large volume of water.
Which characteristic of particles of matter is illustrated by this observation ?
6. When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room
quickly. Which characteristic of the particles of matter is illustrated by this observation ?
7. A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken into
small particles by hammering. Which characteristic of the particles of matter is illustrated by these
observations ?
Answers
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Answer:
1)anything that has mass and occupies space is called matter.
2)diffusion and Brownian
3)diffusion
4)particles have space between them.
5)diffusion
6)its fragrance spreads in the whole room quickly because the particles were mixes with the space present in the air and as the air moves the particles also move and room is full of fragrance.
7)Matter is made up of small particles which attract each other and the attraction differs from substance to substance. Chalk breaks easily on hammering but iron cannot be broken which shows that the particles of iron attract each other with greater force.