Question

Complete the following story in 150 to 200 words :-
There was an old man ____ sitting on the bench ____ feeling sad ______ feeling alone infront of his house _______ his old days were more pleasent then today______.

Answer 1

Answer:

Aim: To observe condensation of water

Materials needed: A glass or metal tumbler, ice-cold water, and a handkerchief

Method:

1. Take the tumbler and wipe it dry, both inside and outside.

3. Wait for sometime and see what happens to the outer surface of the tumbler.

Observation: You will find that the outer surface of the tumbler becomes foggy with water

droplets on it.

Conclusion: This is because water vapour in the atmosphere condenses on the cold sunce

of the tumbler.

Aim: To demonstrate condensation of steam

Materials needed: A vessel with boiling water and a metal lid

Method:

1. Ask an adult to boil some water in a vessel

and carefully place the vessel on a table.

2. Hold the lid on top of the vessel so that the

steam coming from the water touches it.

Observation: After a short while, you will find

that the side of the lid facing the steam will

have droplets of water.

Conclusion: This is because steam from

the water condenses on the metal lid. The

same can be done by holding