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प्रश्न
Stand with this snake below a fan. Look in which direction it moves. Take this paper snake to different places and observe its movement.
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उत्तर
When the snake is kept below a fan, it moves in an anticlockwise direction. This happens because the air is moving in a downward direction.
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संबंधित प्रश्न
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.
- Now put your hands at some distance from your mouth, and blow again. Does the air from your mouth feel warm? Why?
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?
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
Put your finger under your nose. Can you feel any air when you breathe out from your nose?
Count how many times in one minute do you breathe in and breathe out.
Jump 30 times. Did you feel breathless?
What was the difference in your count before and after jumping?
Can you make a mirror hazy in the same way? Can you tell by touching the mirror what made it hazy? Is the air you blew from your mouth dry or wet?
