Drinking seawater is bad for human health. The reason why humans can not consume seawater is because the human kidneys can only make urine that is less salty than salt water. Therefore, to get rid of all the excess salt taken in by drinking seawater, you have to urinate more water than you drank. Eventually, you die of dehydration even as you become thirstier.

The ocean is very important to life on earth. Oceans are the lifeblood of planet Earth and humankind. They flow over nearly three-quarters of our planet, and hold 97% of the planet's water. They produce more than half of the oxygen in the atmosphere, and absorb the most carbon from it.

The ocean current is very important because The world’s ocean is crucial to heating the planet. Also, the ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. And outside of Earth’s equatorial areas, weather patterns are driven largely by ocean currents. Lastly, ocean currents act much like a conveyer belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics.

Zones of the ocean. The oceanic zone is subdivided into the epipelagic zone, or the sunlight zone, a zone that recieves the most sunlight and are 0-200 meters in depth. Mesopelagic, or the twilight zone, is a zone that has very little sunlight and is 200-1,000 meters in depth. And the bathypelagic zone, also known as the midnight zone, is a zone that has no light and is 1,000- 4,000 meters in depth.

Some resources we use from the ocean: salt, sand, gravel, and some manganese, copper, nickel, iron, and cobalt can be found in the deep sea plus oil.