Pressure in liquids and gases
2 marks · NormalExplain why the pressure on your body from the atmosphere does not crush you.
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Because the pressure inside your body is equal to the pressure outside, so the forces balance.
Also accept: Internal and external pressures are equal; Body fluids exert equal pressure outward
Common mistakes: Saying the pressure is small; Forgetting to mention internal pressure
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Marking points
B1 · 1 mark · States pressure inside the body equals atmospheric pressure
B2 · 1 mark · Mentions forces due to these pressures balance
Worked solution
The pressure inside your body is equal to the atmospheric pressure, so the forces balance and your body is not crushed.