Physics GCSE
weight of air
What weight of air means in Physics GCSE, as defined for AQA.
Definitions of weight of air
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Reference: AQA
The total downward force from the air molecules above a surface, which decreases as the height of the surface above ground level increases.
Fewer molecules above a surface at a greater height means a smaller weight of air pressing down on it.
Topics that use weight of air
- Atmospheric pressure (AQA GCSE)
Related terms
- altitude
- average density
- collision frequency
- column of air
- comparing heights
- compression by the air above
- extra layer of air
- force per unit area
Using weight of air in the exam
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