The Ocean
An ocean is a large body of saline water. About 97.5% of the total water of the planet Earth is saline. There are 5 oceans on the Earth, and are given in order from largest in size to the smallest:
- Pacific Ocean (The Largest)
- Atlantic Ocean
- Indian Ocean
- Antarctic Ocean, and
- Arctic Ocean (The Smallest)
Sea
A Sea is normally a part of an ocean. An ocean near the land is usually called a sea. And, few seas are fully enclosed by land. For example, the Caspian Sea is the largest enclosed inland body of water on the Earth. So the Caspian Sea is also called a lake. And, it is the largest lake in the world.