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Air

Air > Ask Alfie
cee
Hi
What happens when air is heated?
user
cee
Air expands, becomes lighter and goes up when it is heated. Cold air is denser and heavy and that is why it tends to sink down. When hot air rises, cold air from surrounding area rushes there to fill in the gap. That is how air circulation takes place.
cee
Some of the learners also asked:
Which air is denser?
speak