CBSE Class 9 Science Matter in Our Surroundings Worksheet Set G

MATTER IN OUR SURROUNDINGS

1Mark Questions:

1. List any four characteristics of particles of matter.

2. Name two natural processes which provide the best evidence of motion of particles in matter.

3. Even one or two crystals of copper sulphate can make its solution in water coloured blue. Why?

8.Which property of gases makes it possible to fill large volume of gases in small cylinders.

9. A spoonful of sugar is added to a beaker containing 500 ml of water and stirred for a while. State any two observations that you will make.

10.Suggest a method to liquefy atmospheric gases.

11.Why do we feel cool after applying shave lotion or perfume?

2 Mark Questions:

1. A gas jar containing air is placed upside down on a gas jar of bromine vapour. It is observed that after some time, the gas jar containing air also becomes reddish brown. a)Explain why this happens. b)Name the process involved.

2. Predict the physical state of matter in each case from the following characteristic.

a) It has a definite volume but no definite shape.

b) It is rigid and highly incompressible.

c) Kinetic energy of particles is minimum in this state.

d) It represents the most highly compressible form of matter.

3. Distinguish solids , liquids and gases in a tabular form under the following properties.

a) rigidity

b) compressibility

c) inter particle force of attraction

d)kinetic energy of particles.

4.What is Diffusion and explain why, it occurs faster in a gas than in a liquid.

5.Ice,water and steam are three states of a substances and not different substances. Justify.

6.Convert the following celsius temperatures to kelvin scale

i) -273 0C ii) 300 C iii) -1000 C iv) – 400 C

7. Dry ice is obtained when a gas is compressed at high pressure. Name the gas and state what happens to it when the pressure is released.