World Geography
The ionosphere includes

thermosphere
thermosphere, exosphere and mesosphere
thermosphere and exosphere
mesosphere

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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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World Geography
What are secondary mineral deposits formed in caves called?

Pyroclastic debris
Speleothems
Ejecta Blanket
Speleogenesis

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World Geography
The process of weathering results into

All of these
a breakdown of one mass in to two or more masses, with no chemical change in the mineral or rock
the complete loss of particular atoms or the compounds from the weathered surface
the addition of specific atoms or compounds to the weathered surface

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