The most abundant element in sea water is
The sea water contains 18.98 parts per thousand of chlorine, 10.56 parts per thousand of sodium and 1.27 parts per thousand of magnesium.
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 ?