is the largest ocean on Earth, is two times bigger than the Atlantic and also contains twice the volume of water: Pacific Ocean.
The ocean is divided into three main areas: pelagic, demersal and benthic, depending on the sunlight.
Currents can happen in rivers, lakes, swamps and other water systems. Causes, types and the importance of ocean currents.
The tides are not unique in the oceans; they can occur in other water systems. Types and causes of tides.
What is a tsunami? A Tsunami is a series of gigantic water waves that causes a surge of water onto land.