In a simple model, the atmosphere is a layer of air with the same density at all heights.
In this model, how does atmospheric pressure change as the height above the ground increases?
It stays the same up to the top of the atmosphere
It decreases by a larger amount for each metre of height
It decreases by the same amount for each metre of height
It increases, because there is less air pressing down
50 exam-style questions on OCR GCSE Physics 1.3 Pressure, covering 1.3.1 Molecular motion, temperature and gas pressure, 1.3.2 Gas pressure at constant volume, 1.3.3 Compressing and expanding gases, 1.3.4 Gas volume and pressure at constant temperature, 1.3.5 Doing work on a gas, 1.3.6 The Earth's atmosphere and atmospheric pressure, 1.3.7 Atmospheric pressure and height, 1.3.8 Floating and sinking, 1.3.9 Pressure in liquids and upthrust, and 1.3.10 Pressure differences with depth. Each one has a worked solution and a mark scheme showing where the marks go.