World Geography
The part of the earth and thin layer of air above its surface, which support life on earth, are referred to as

biosphere
mesosphere
stratosphere
ionosphere

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World Geography
The Penumbra is

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

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World Geography
The “Planetoids” are located between which among the following?

Earth & Mars
Saturn & Jupiter
Mercury and Venus
Mars and Jupiter

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