Question

hot air rises up and cool air sinks down.explain why?​

Answer 1

Explanation:

As hot air cools it sinks back to the surface of the earth, where it gets warmed by the ocean only to rise again. This is called a convection current. ... The main reason that hot air rises is because sinking cold air pushes it up. However, other things like mountain slopes can also cause hot air to rise.

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Answer 2

Cold air is consist of closely packed air particles due to which, cold air is heavier.

Hot air is consist of loosely packed air particles due to which the hot air is lighter.

Therefore, cold air being heavier sinks down and hot air being lighter rises up.