Question

What is the difference between high and low pressure??

Answer 1

There are two physical differences between Low pressure systems and High pressure systems.

First, is the circulation surrounding them.

Secondly, is the atmospheric motion that they cause.

Low pressure systems circulate counter-clockwise.

High pressure systems circulate clockwise.

These "motions" (caused by these circulations) are the building blocks in our atmosphere. They give us our weather.