Biosphere

Biosphere

  The biosphere is the places on Earth were plants, animals, and one-celled organisms live. Most life on Earth is in a zone 10 feet below the ground to 100 feet above it. In the oceans top 600 feet is where most of the life is found because of the direct influence of the sun. At the bottom of the sea hydrothermal vents called black smokers support a complex food chain using chemicals alone. Unlike all other life on Earth they live independent of any solar energy and might exist on other planets and moons in the solar system. Simple single cell life has also been found in even more extreme environments. The biosphere is the sum all living organisms of Earth.