5th EVS NCERT Chapter 15
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Topics to study from the chapter "Blow Hot, Blow Cold":
1. Understanding the concept of hot and cold air through practical activities like blowing on hands and objects.
2. Usage of breath to cool or warm things.
3. Making a paper whistle to experiment with different sounds produced by blowing air.
4. Observing the direction of air flow using a paper snake.
5. Exploring the effects of blowing on objects like spectacles and glass.
6. Measuring breath count and understanding the concept of respiration.
7. Listening to heartbeat using a stethoscope.
These topics cover practical demonstrations and observations related to the concepts of hot and cold air, breath, and sound production through blowing. Students are encouraged to engage in hands-on activities to deepen their understanding of these phenomena.
What would have happened if Balishtiye had eaten the hot potatoes without cooling them?
How do you cool some food when it is too hot?
Which do you think will be hotter – Mini’s tea or the air she blew from her mouth?
For what other things do you blow air from your mouth?
How does the air from the mouth help clean spectacles, and what happens to a glass when you blow on it?
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