The oceans are important to life on Earth because they are home to an estimated 10 million different species. In addition, the water cycle purifies much of the salt water that allows organisms living on land to have fresh water. Many people and mammals also heavily rely on the oceans’ fish for food.
This is a simple diagram of the zones of the ocean. The Sunlight Zone gets the most sunlight out of them and it extends from the surface to about 656 feet below. The Twilight Zone gets little sunlight, so no plants can grow here. It is located from 656 to 3,280 feet below the surface of the water. The Midnight Zone is the first layer where no sunlight can reach, so many of the fish who live here have no eyes because they wouldn’t see anything even if they could. This layer is between 3,280 and 13,123 feet below the surface. The Abyss is located from 13,123 to 19,685 feet below the ocean’s surface. Many of the organisms here actually have no backbones. The Hadal Zone is the deepest ocean zone, at -19,685 feet and below. It is just barely above the freezing water temperature.
As the ocean depth increases, water pressure increases rapidly. Water temperature decreases with depth increase though, especially at around -1,000 feet and below.
Resources From The Ocean: sand, gravel, salt, nickel, iron, copper, crude oil, seafood