What is Standard atmospheric pressure?

Standard atmospheric pressure is the pressure that air pushes down on us from above, like a blanket pressing gently on our heads.

Imagine you're sitting under a big, invisible umbrella, this is the air around us. It's not just floating there; it’s actually pushing down on everything below it, including you! That push is what we call pressure. At sea level, where most of us live, that pressure is about 1013 hPa, which is like having a big stack of books, about 10 meters tall, sitting on your head!

You might not notice it because you're used to it, just like how you don’t feel the ground pushing up against your feet. But if you go up in a balloon or a plane, there's less air above you, so the pressure goes down, and that’s why your ears pop sometimes!

Knowing standard atmospheric pressure helps scientists and pilots understand how things work at different heights. It’s like having a ruler for the sky!