Two weather stations are operating at the same time. One is at a greater height above the Earth's surface than the other, and its atmospheric pressure reading is lower. Which statement explains this difference?
The higher station is closer to space, so there is almost no air there to collide with its sensor
The higher station's sensor has a smaller area, so the atmospheric pressure is lower
There is less air above the higher station, so the total weight of air above it is smaller
The gravitational field strength is much weaker at the higher station, so the air there weighs much less
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.