Multiple choice

The activity justifying the statement that “warm air is lighter than cold air” is

  1. baking of a cake

  2. blowing of a balloon

  3. melting of wax

  4. rising of smoke produced by burning
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Anything which is lighter in weight as compared to the other will rise up. The smoke produced from the burning process is hotter and lighter in weight. That is why it can always be seen rising up in the air.

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