Subject :NSO Class : Class 5
Which of the following statement is correct?
ASmoke always rises up in the atmosphere because hot air is lighter than cold air.
BSmoke always comes down in the atmosphere because hot air is lighter than cold air.
CSmoke always rises up in the atmosphere because hot air is heavier than cold air.
DSmoke always rises up in the atmosphere because hot air is heavier than cold air.
Answer A is correct but options C and D are repeated.
Ans 1:
Class : Class 5
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