Question

Discuss an activity for each, to prove the following:-
(1) Particles of matter are continuously moving,
(ii) Particles of matter attract each other.
(iii) Gases are more compressible as compared to solids and liquids.
(iv) The particles of matter are very small beyond our imagination.
Give explanations for the observations made.​

Answer 1

Answer:

1)Take two glasses/beakers filled with water.

Put a drop of blue or red ink slowly and carefully along the sides of the first beaker and honey in the same way in the second beaker.

Leave them undisturbed in your house or in a corner in the class.

Record your observations. What do you observe immediately after adding the ink drop?

What do you observe immediately after adding a drop of honey?

How many hours or days does it take for the colour of ink to spread evenly throughout the water?

2)Take an iron nail, a piece of chalk and a rubber band.

Try breaking them by hammering, cutting or stretching.

In which of the above three substances do you think the particles are held together with greater force?

3)Take three 100 ml syringes and remove their pistons. Also, close the nozzles of the syringes with rubber

corks. Then, fill one syringe with chalk powder and the other with water. Now, insert the pistons back into the syringes and push them.

You will observe that the pistons of the syringes (containing chalk pieces and water) require a large

amount of force, while the piston of the third syringe is comparatively easier to push. Hence it

shows that gases are highly compressible.

4)aim: to prove that the particles of matter are very small

materials required: beaker, water, salt and glass rod

procedure:

take a 100 ml beaker

fill half the beaker with water and mark the level of the water

dissolve some salt/sugar with the help of glass rod

obsevations:we see that the level of water doesn't change.

conclusion: this proves that the platicles of matter are very small in size