Which is the only natural satellite of earth?

Which layer present in the atmosphere absorbs harmful ultra violet radiations?

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

Who was the first to circumnavigate earth?

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

What is the average speed of the revolution of the Moon around Earth?

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

The presence of which factor made life possible on earth?

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

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