CBSE Class 9 Science Matter In Our Surroundings Worksheet Set A

Read and download free pdf of CBSE Class 9 Science Matter In Our Surroundings Worksheet Set A. Students and teachers of Class 9 Science can get free printable Worksheets for Class 9 Science in PDF format prepared as per the latest syllabus and examination pattern in your schools. Standard 9 students should practice questions and answers given here for Science in Grade 9 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 9 Science Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems provided here with solutions on daily basis to get more score in school exams and tests

Matter In Our Surroundings Class 9 Science Worksheet Pdf

Class 9 Science students should refer to the following printable worksheet in Pdf for Matter In Our Surroundings in standard 9. This test paper with questions and answers for Grade 9 Science will be very useful for exams and help you to score good marks

Class 9 Science Worksheet for Matter In Our Surroundings

CBSE Class 9 Science Worksheet - Matter in Our Surroundings. Students can download these worksheets and practice them. This will help them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

WORKSHEET- I

1 Mark Questions:

1.List any two characteristics of particles of matter.

2.Melting points of four solids A,B,C and D are 78° C, 262° C,100° C and 168° C.Arrange them

in the decreasing order of their Inter particle force of attraction

3.An unlit incense stick (agarbatti) gives smell only when we come close to it but on lighting

the stick we get smell even far away from it, why ?

4.What is the effect of temperature on kinetic energy?

5.Which has highest kinetic energy, particles of water at 100ºC or steam at 100ºC?

6.Why gases are compressible but not liquids?

7.Give the full form of LPG and CNG.

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 liquify 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. (CBSE2012,2013) 

6.Convert the following celsius temperatures to kelvin scale

i) -273° C ii) 30° C iii) -100° C iv) – 40° 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? (CCE 2011)

3 Mark Questions:

1.Give reasons for the following:

a) A sponge is a solid but can be easily compressed.

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. ( CCE 2012)

3. How will you show by experiment that air contains water vapours?

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 0 degree Celsius is more effective in cooling than water at 0 degree Celsius.

6.Why does water have higher boiling point than alcohol? At what temperature in kelvin,it can

be changed into solid state and into vapours?

7.Explain the different processes involved in the flowchart given below. ( CCE 2012)

8. When water is heated at a temperature x by a process called P. And 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 ? 

Exam Questions NCERT Class 9 Science Chapter 1 Matter in Our Surroundings

Question The Kelvin scale temperature is 0 K. What is the corresponding Celsius scale temperature?
Ans : –273°C

Question. How is the high compressibility property of gas useful to us?
Ans : The gases have high compressibility. This property is used in the following situation :
(i) LPG (Liquefied Petroleum Gas) is a fuel which is made up of petroleum gas. On compressing this petroleum gas it forms liquid.
(ii) Oxygen cylinders in the hospitals have compressed gas filled in it.
(iii) CNG (Compressed Natural Gas) is a natural gas i.e. methane, which is compressed and used as a fuel in vehicles and at home.

Question With the help of an example, explain how diffusion of gases in water is essential?
Ans : The gases from the atmosphere diffuse and dissolve in water. Diffused gases like oxygen and carbon dioxide in water are essential for the survival of aquatic
animals and plants. Animals breathe in this oxygen dissolved in water for their survival and plants can use carbon dioxide dissolved in water for photosynthesis.

Question Is it true to say that fluorescent tube contains plasma? Explain
Ans : It is right to say that fluorescent tube contains plasma. As fluorescent tube has helium or some other rare gas. The particles of the gas get ionized in the presence of high voltage applied. These charged particles are called plasma which glows.

Question A rubber band is a solid, but it can change its shape. Why?
Ans : A rubber band changes shape under force and regains the shape when the force is removed, this is due to less intermolecular force of attraction between the particles.

Question. We can get the smell of perfume sitting several metres away, why?
Ans :
 This is because perfumes diffuse very fast and can reach to people sitting several metres away.

Question When salt or sugar is poured into different kinds of vessels, why do they take the shape of vessel as they are solid?
Ans : Salt or sugar takes the shape of containing vessel, but does not change its individual shape. For example : Sugar crystal is cubical and they remain cubical in any vessel.

Question. What is dry ice?
Ans : Solid carbon dioxide obtained by cooling and applying pressure on carbon dioxide gas. It does not melt so it is called dry ice.

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