The layer of rocks which forms the surface of earth is called -----------

Which is the only natural satellite of earth?

Who was the first to circumnavigate earth?

The weight of a substance is related to the effect of force of ------- on that substance.

Which position does the Earth stands in terms of size in our solar system?

The layer of water on the surface of Earth is called --------

From the following which indicates the percentage of water present on earth surface?

Polestar appears vertically overhead at the ----------- .

Which is the richest gas present in Earth?

One stadia is equal to -------- metres.