World Geography
What is the average density of the ‘core’ of the Earth?

2 gm/cm3
12 gm/cm3
2.9 gm/cm3
5 gm/cm3

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World Geography
The modern theory of plate tectonics states

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

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World Geography
The process of evaporation of water in nature is one of the basic components of the hydrological cycle. The other process that is considered to be essential for the completion of hydrological cycle is the

movement of water vapour in the atmosphere
movement of water in the water table
flow of water in the sea
flow tide and ebb tide in a river

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