The major constituent of atmosphere by per cent is _______________

The deepest point on the earth is _____________ in the Pacific Ocean.

Name the Research stations in Antarctica .

The __________ ocean is the only named after a country .

How many kilometer the Atmosphere is extends ?

Name the country the lies in the Southern Hemisphere .

The domain of the Earth consisting of solid rock is ___________ .

Which is larger than Asia ?

How many continents are there ?

Europe and Asia together make a word that is __________ .

Longest River in the world .