World Geography
The ionosphere contains ionized air that protects the earth from

the infrared rays of the sun
None of these
the falling meteorites
the ultraviolet rays of the sun

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World Geography
Which among the following statements is/are correct about impact crater?They are formed by the hypervelocity impact of a smaller bodyThe have similar composition like sinkholes, glacial cirques,etcSelect the correct code from the options given below:

Only 1
Only 2
Both 1 & 2
Neither 1 & 2

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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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