World Geography
The relative abundance of dissolved salts in seawater in descending order is as follows

chlorine, magnesium, calcium, sodium, potassium, sulphate
chlorine, sodium, sulphate, magnesium, calcium, potassium
chlorine, sodium, magnesium, calcium, potassium, sulphate
sodium, chlorine, magnesium, potassium, sulphate, calcium

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World Geography
The temperature inversion is

whenever the normal decrease of atmospheric temperature or moisture or both change with height over
when the decrease in temperature or moisture or both takes place
whenever the normal decrease of atmospheric temperature
All of these

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