Question

Describe an activity to demonstrate that warm air is lighter than cold air. ​

Answer 1

Answer:

Take two paper bags of the same size and hang them in inverted position on the two ends of a wooden stick. ... Place a burning candle below one of the bags. The bag above the candle goes up, as the air above the candle becomes warm, it rises, and pushes the bag up.

Answer 2

Answer:

Here is your answer bro

Explanation:

i) Take two same sizes of empty paper bags.

ii)  On the two ends of a wooden stick hang the both of bags in an upturned position.

iii)  In the centre of stick tie a portion of thread.

iv)  According to the figure (A), hold the stick by the thread in balance.

v)  According to the figure (B), place the burning candle below one of the bags.

vi) Now, you will observe unbalanced stick. This represents that as the

warm/temperate air rises up and it pushes the bag over the candle.

vii) Now we can say that when air is heated, it expands and also occupies more space. So, we can conclude that warm air is lighter as compared to cool air.

or

• Take two paper bags of the same size and hang them in inverted position on the two ends of a wooden stick.
• Tie a thread in the centre of the stick and hold the stick by the thread to balance it.
• Place a burning candle below one of the bags.
• The bag above the candle goes up, as the air above the candle becomes warm, it rises, and pushes the bag up.

There are two pictures which I have and those pictures will give you more information:

Hope it helps!!!

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