Which is the largest ocean in the world?
Which is the longest river in the world?
Which is the broadest river in the world?
Which river is known as the "YELLOW RIVER" ?(river of yellow soil)
Which is the tallest grass in the world?
Which is the largest desert in the world?
Where does the basin of River Amazon locate?
Which are the tallest trees?
Which is the highest peak in the world?
Among the seven wonders of the world , which can be seen through space?