because its the ocean ;D
To make them more conspicuous. There are actually several marks on most vessel the different marks represent different areas of the worlds oceans and the season. for instance the highest mark is north Atlantic winter.
200 times more than the land surface
More dense, however the effect that evaporation has on the oceans is negligible due to their sheer size.
Because the earth oceans have more water to evaporate and make water vapor.
more mass = more gravity
Less extreem
density = mass/volume There are only two possibilities. It has more volume or less mass.
No. Most of the earth's core is liquid, as are all the seas and oceans, covering more than 70% of the earth.
oceans
It is not known how much of the plastic in the world ends up in the ocean. The oceans are becoming more polluted with various types of debris and trash.
Oceans make temperatures less extreme, was water tends to take a long time to heat up and cool down.