World Geography
The umbra is

the inner portion of the moon's shadow
None of these
formed by tangents to the sun and moon
both (a) and (b)

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World Geography
The modern theory of plate tectonics states

All of these
that the oceanic crust is destroyed at areas where this crust type becomes subducted under the light
the convention currents within the earth's mantle cause the creation of new oceanic crust at the mid
the creation of oceanic crust and the drifting of continents

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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
Only 1
Neither 1 & 2
Both 1 & 2

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