In which century the early attempt of estimating the size of the earth was made ?

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

When lunar eclipse occurs the shadow of earth falls on -----------

The diameter of the moon is ______ km.

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

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

Which is the hottest planet in the solar system?

The presence of which factor made life possible on earth?

From the following which is the optimum distance between sun and earth.

Who is the Greek philosopher: Who state that the earth was in spherical shape?