CBSE Class 9 Science Matter in Our Surroundings Worksheet Set 07

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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.

8.Latent heat of evaporation of two liquids A and B is 100J/kg and 150J/kg respectively. Which one can produce more cooling effect and why?
 
3 Mark Questions:
 
1.Give reasons :
 
a) Our planet does not become completely dry during evaporation.
 
b) Clothes dry faster on a windy day.
 
c) Smell of perfume travels a few yards away.
 
2.a) Enumerate the changes that take place inside the matter during the change of states.
 
b) When a solid melts, its temperature remains the same. Give reason.
 
3. How will you show by experiment that air contains water vapour?
 
4. Distinguish between Evaporation and Boiling.
 
5.Give reasons for the following:
 
a) Doctors advise to put strips of wet cloth on the forehead of a person having high temperature.
 
b) Ice at 00C is more effective in cooling than water at 00C.
 
6.Why does water have higher boiling point than alcohol? At what temperature ( in Kelvin scale), it can be changed into solid state and into vapours?
 
7.Name the processes involved in the following cases.
 
a)Solid into liquid b) Liquid in to vapour below boiling point.
 
c)Solid into vapour/Gas d) Gas/Vapour into liquid
 
e)Liquid into solid f) Gas/Vapour into solid
 
8.When water is heated at a temperature ‘X’ by a process called ‘P’& when steam gets reconverted at the same temperature into water and the process is called as ‘Q’.
 
a) What is the temperature ‘X’ in Kelvin ?
 
b) What is the process ‘P’ & ‘Q’ known as ?
 
c) Name the energy released and absorbed during process P &Q respectively ?
 
 
Please click on below link to download CBSE Class 9 Science Matter in Our Surroundings Worksheet Set G

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Exam Preparation Worksheet for Class 9 Science Chapter 01 Matter in Our Surroundings

CBSE Practice Material: Class 9 Science Chapter 01 Matter in Our Surroundings

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Are these Science Class 9 worksheets based on the 2026-27 competency-based pattern?

Yes, our CBSE Class 9 Science Matter in Our Surroundings Worksheet Set 07 includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 9.

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