Which is the second largest ocean in the world? 

Which is the third largest ocean in the world? 

The vast body of salt water that covers a considerable portion of the Earth's surface is called as an :

Which one of the following is an enormous source of energy?

The fall of water level is called :

Which is a narrow stretch of land linking two landmasses and separating two water bodies? 

Which is the most important part of the ocean floor for man? 

Which of the following is the smallest ocean in the world? 

The regular movement of water from one part of the ocean to another is called :

The Benguela current, Peru current and California current etc are the examples of  :