Introduction to winds
Hold your palm over your nose, and breathe out hard — you must have felt something from your nose pressing against your palm, yes? You did not see it, but you clearly felt it. What you felt is what we call 'air'.
Now, if you have seen a vacuum cleaner work, you will notice how it sucks all the little debris, pieces of rubbish and dust in its’ path. Again, that was air being sucked together with all the little stuff.
Both scenarios have something to do with air being directed at or pulled from something. They both have something to do with air pressure, and the movement of air from one place to the other. This is not 'wind' yet, but we need to understand something about AIR, so we can have a better understanding of the lesson on winds.
The earth is surrounded by the atmosphere (a blanket of gases). These gases extend about 400 miles into the sky above, and it is made up of nitrogen, oxygen, argon, carbon dioxide, hydrogen and many more others. All these gases that make up the atmosphere is what we commonly call Air.
Air, like other liquids and gases, are fluids. The particles in these fluids can move from place to place, typically from a high-pressure area to a low-pressure area.
Did you know?
Wind can be very useful especially for energy. (check here for wind energy)
Now we shall see how 'air' and 'wind' relate, and how winds behave in many different places and conditions around the earth. Ready?