---
title: "Why does the pressure of the Earth’s atmosphere decrease as you move to a higher altitude, and how does this relate to the definition of an ideal fluid?"
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date_modified: "2026-08-18T02:38:42+00:00"
---

# Why does the pressure of the Earth’s atmosphere decrease as you move to a higher altitude, and how does this relate to the definition of an ideal fluid?

Why does the pressure of the Earth’s atmosphere decrease as you move to a higher altitude, and how does this relate to the definition of an ideal fluid?

- **A.** At high altitudes, the air becomes a solid, which changes the way pressure is exerted.
- **B.** The temperature decreases with altitude, which is the only factor that reduces pressure in a fluid.
- **C.** Air is an ideal fluid, so the pressure decrease is perfectly linear with height.
- **D.** The density of air decreases with altitude, meaning air does not behave like an ideal, incompressible fluid.

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