Question detail
Which option best applies physics only for Pressure in liquids (physics only) in AQA GCSE Physics Forces?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Pressure and pressure differences in fluids (physics only)
Question
- A. The weight of the liquid above — graph focus for physics only
- B. This confuses mass and weight and does not answer Pressure in liquids (physics only).
- C. This is too vague because it does not use the force or motion quantity named in the objective.
- D. This reverses the physical cause and effect for Pressure and pressure differences in fluids (physics only).
Answer
The correct answer is: The weight of the liquid above — graph focus for physics only
Explanation
The correct option is The weight of the liquid above — graph focus for physics only. The weight of the liquid above — graph focus for physics only is correct because it matches the approved learning objective to (Physics only) Explain that pressure in a liquid is caused by the weight of liquid above. This answer belongs to Pressure in liquids (physics only) within Pressure and pressure differences in fluids (physics only), so it must use precise AQA GCSE Physics forces and motion vocabulary. The other options are wrong because they either confuse mass and weight, omit the required force or motion condition, or move away from the exact subtopic being tested.
Common mistake
Confusing liquid pressure with atmospheric pressure
Students often think that the pressure at a point in a liquid is the same as the atmospheric pressure above the liquid surface, ignoring the additional pressure from the weight of the liquid column.
Explain that liquid pressure at depth is the sum of the atmospheric pressure at the surface and the hydrostatic pressure from the weight of the liquid above, calculated as p = ρgh. Emphasise that the weight of the liquid column adds to the atmospheric pressure, not replaces it. In Pressure in liquids (physics only), correct the mistake by naming the relevant force or motion quantity and checking mass and weight.
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