Answer :

As we know that warm air rises up and it is lighter because it expands.

Cool air sinks down because it is heavy and is compresses air and has high pressure.

So the answer to the question is,

On heating air, it expands and rises.

On cooling air, it contracts and descends.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.

Describe an activNCERT - Exemplar Science

Paheli kept an emNCERT - Exemplar Science

Match Column I wiNCERT - Exemplar Science

To expel hot air NCERT - Exemplar Science

State whether theNCERT - Exemplar Science

Four schematic diNCERT - Exemplar Science

A fire alarm usuaNCERT - Exemplar Science

<span lang="EN-USNCERT Science

<span lang="EN-USNCERT Science