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

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

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World Geography
Which among the following statements is correct about Mesa?

It is a narrow pass or gorge between mountains or hills
It is an elevated area of land with a flat top and sides that are usually steep cliffs
It is a secluded hollow
It is a small hill

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