World Geography
The term 'Abyssal' refers to

deeper parts of the oceans
None of these
organism found in the shallow water zone of the seas
inner most part of the earth

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

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

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