Question

i) On a very cold morning, Boojho and Paheli were talking with each other as they
walked down to their school. They observed that the air coming out of their mouth
looked like smoke. They were amused and wondered how it happened. Why did it
happen?
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Answer 1

Answer:

this happened because of cold.when our body and surrounding is cold so a smoke like gas come out from our mouth

Answer 2

Answer:

it is Co2 and it is a hot gas in summer we can't see it because the temperature is appropriate to co2 , in winter the temperature is low so the exhaled air is hot than fog. so we see the smoke coming out from our mouth and nose