Ozean

Ozean
Approximatley 71 % of the earth surface is covered by ocean.
The three biggest are : Atlantic Ocean
Pacific Ocean
and Indian Ocean.
The oceans covere 3/4 of the earth surface and have great impact on the biosphere.
the common coulor is blue because the sky is blue. But in fact the water as very slight blue.
The oceans are divided in pelagic zone,photic zone,aphotic zone (look at the pic).