The difference between the diameter of the Earth at the poles and at equator is
This difference proves that the earth is flattened at the poles and is thus, not a perfect sphere. The shape is reffered to as "geoid"
The shortest air route from Moscow to San Francisco is
The world's largest river is the......
...................is called the "land of a thousand lakes"
Which is the fourth planet from the sun ?
Which of the following cities is not one of the capitals of South Africa ?