Environmentalhard · Past Paper
The unit 'Dobson' is used to measure the thickness of:
ASoil layers
BIce sheets
CThe ozone layer
DSmog density
✓ Correct Answer: C — The ozone layer
One Dobson Unit (DU) is the number of molecules of ozone that would be required to create a layer of pure ozone 0.01 millimeters thick at STP.
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