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GCSE Geography · key term
The force exerted by the weight of air on an area of the Earth's surface.
Used by AQA, Edexcel and OCR
Specification 3.1.1.3 · Paper 1
Revise: Global Atmospheric CirculationAtmospheric pressure is the force exerted by the weight of air on the Earth's surface. Heating makes air expand and become less dense, so it rises. Rising air is associated with low pressure at the surface.
Specification 2.1 · Paper 1
The force exerted by the weight of air on a unit area of the Earth's surface.
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Paper 1
The force exerted by the weight of air on a given area of the Earth's surface.
Revise: Atmospheric circulationVertical air movements help create differences in atmospheric pressure at the surface. Rising air is associated with low pressure, while sinking air is associated with high pressure. At the surface, air moves from areas of higher pressure towards areas of lower pressure.
The force exerted by the weight of the overlying air per unit area of a surface.
Specification 1.1a · Paper 1, Paper 3
The force exerted by the weight of air on a surface. Rising air is associated with low surface pressure; sinking air is associated with high surface pressure.