World Geography
The oldest rock system of the world is:

The Primitive Rock system
The Zircons Rock system
None of these
The Archaean Rock system

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World Geography
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to

None of these
infrared rays from the sun
ultraviolet rays from the sun
the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun

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