DENSITY AND PRESSURE
2 marks · NormalA diving suit is made with thicker material for deeper water. Explain using ideas of pressure and area, and state the correct unit for pressure, why this is important for safety.
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Pressure increases with depth in water (measured in pascals, Pa). Thicker material is needed to withstand the increased pressure over the area of the suit for safety.
Common mistakes: Saying 'force' instead of 'pressure'; Omitting the unit
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Marking points
B1 · 1 mark · States that pressure increases with depth (mentioning Pa for pressure)
B2 · 1 mark · Links thicker material to need for greater resistance to pressure (over the area of the suit)
Worked solution
Pressure in water increases with depth and is measured in pascals (Pa). The pressure acts on the area of the suit. Thicker material is needed to resist the higher pressure at greater depths for safety.