Why does atmospheric pressure decrease with altitude? A6. There are fewer air molecules above you as altitude increases, so the weight of the air column decreases.
Why does a dam have a thicker base than top? A3. Pressure increases with depth, so the base must be thicker to withstand the greater force. aqa science p2 5.5 activity sheet answers
What is upthrust? A8. An upward force exerted by a fluid on an object immersed in it (caused by higher pressure at the bottom of the object than at the top). Why does atmospheric pressure decrease with altitude
Here are the for a typical AQA GCSE Science P2 – 5.5 Activity Sheet (topic: Pressure and Pressure Differences – often part of the Particle Model of Matter or Forces unit, depending on the specific sheet). Why does a dam have a thicker base than top
Explain why your ears ‘pop’ during takeoff in an aeroplane. A7. Outside air pressure decreases rapidly at high altitude; pressure inside the ear is initially higher, so air pushes out until equalised.