It's a bit of a trick question! "Atmosphere" refers to the layer of gases surrounding the Earth, not a depth.

Here's why it's tricky:

* Pressure: We often talk about "one atmosphere" as a unit of pressure, equivalent to the pressure at sea level. This pressure is caused by the weight of the air above us.

* Depth and Pressure: The deeper you go into the atmosphere, the higher the pressure because there's more air above you.

So, there's no single "depth" for one atmosphere.

What you *can* say is:

* One atmosphere of pressure is at sea level.

* As you go higher in the atmosphere, the pressure decreases.

Let me know if you have any other questions!