WHAT IS RESPERITORY GAS?

hen did the world war 2nd end??

Miya Balishtiye was confused when he saw the woodcutter blowing on his cold hands to make them warm and on the hot potatoes to cool them.

• Have you warmed your hands in winter by blowing on them when they are cold? How does it feel?

• Blow hard from your mouth onto your hands. How did you find the air from your mouth as compared to the air around? Was it hotter, or cooler?

• Now put your hands at some distance from your mouth, and blow again. Does the air from your mouth feel warm? Why?

• Can you think of any other way in which you use the warmth from your breath?
• Fold a piece of cloth 3-4 times. Now bring it close to your mouth and blow hard on it. Did the cloth become warm?
• Balishtiye saw that the woodcutter was trying to cool the hot potatoes by blowing on them. What would have happened if he had eaten the potatoes without cooling them?
• Have you ever burnt your tongue when you ate or drank something that was too hot? How do you cool some food when it is too hot?
• If you were to cool these three hot things – dal, roti, rice – in which ways would you do so?
• Mini tried to cool her tea by blowing on it. Which do you think will be hotter – Mini’s tea or the air she blew from her mouth?

• Sonu was feeling very cold. He kept blowing on to his hands. Now think and write, which will be cooler – Sonu’s hands or his breath?

• For what other things do you blow air from your mouth?

Make whistles of the things given below. Write in a sequence–from

the loudest to the softest whistle.

- Wrapper of a toffee ______________

- A leaf ______________

- A balloon ______________

- The cap of a pen ______________

- Any other thing ______________

Have you seen people playing different musical instruments like flute, dholak, been ...., guitar, mridang, etc. Can you recognise their sounds with your eyes closed? Find out more about these musical instruments. Collect their pictures too.

Can you name some things which produce melodious or pleasing sounds when we blow into them.