Pressure and depth
2 marks · EasyExplain why the pressure in a liquid increases with depth.
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Also accept: There is more liquid above so greater weight and force at greater depth.; Deeper liquid means greater pressure due to more weight pressing down.
Common mistakes: Saying only that pressure increases with depth without explanation
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Marking points
B1 · 1 mark · States pressure is due to the weight of liquid above
B2 · 1 mark · Explains that more liquid above means more force/weight per unit area at greater depths
Worked solution
As depth increases, the amount of liquid above increases, so the weight of liquid pressing down increases. This greater force per unit area means the pressure increases with depth.