World Geography
Which among the following statements is/are correct about Density of ocean water?Salinity is inversely related to seawater density.Seawater density decreases with increasing salinity and vice versa.Select the correct code from the options given below:

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

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World Geography
Which among the following statements is/are correct about the stratosphere?The Stratosphere is the layer of the Earth’s atmosphere which lies beyond the mesosphere.It extends up to an altitude of 50 kilometres from the earth’s surface.This layer is ideal for flying aeroplaneSelect the correct code from the options given below:

1, 2 & 3
Only 1
Only 2 & 3
Only 1 & 2

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World Geography
The Penumbra is

the outer portion of the moon's shadow
formed by the tangent that intersects between the sun and the moon
None of these
both (a) and (b)

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