Why is it that the pressure much larger at the depth of the earth (ex: Mariana Trench) than it is on the surface

Question

I’m studying about pressure right now, and I’m wondering about this

In: Physics

Answer 1

Imagine that all of the air above your head is a big old column. It pushes down on your head, crushing you with around 15 pounds for every square inch.

That’s a fair amount of air.

Now you go underwater. All of the water above your head is now added to this column; a lot of weight, all crushing down on you.