The Four Spheres of Life
Life on earth can be split into four parts. On a global scale, each part can be thought of as a sphere, roughly the same size and shape as the planet. These spheres provide the vital elements all life needs to survive on the planet. Each one holding there own importance. They form the building blocks of life on planet earth.
Atmosphere - Hydrosphere - Lithosphere - Biosphere
Life Beautiful Life! The Biosphere is comprised of every living organism on earth. There are thousands of unique ecosystems all over the globe containing thousands of different species. Whether its high in the mountains or deep into the jungle there are a vast array of living organisms big and small roaming our beautiful planet.
The Solid Crust of the earth makes up the Lithosphere. The very ground we all walk on every day, helping to hold together the beautiful surroundings we have been blessed with. The lithosphere has 2 key layers Crust and Upper Mantle. The Crust is Predominantly firm however the mantle behaves elastically on time scales of thousand of years or greater.
The Air we breathe is evidently vital for our survival as well as every other living organism. As such the atmosphere is an extremely important part of the planetary system. Comprised of a variety of different elements 78% Nitrogen, 21% Oxygen, 0.9% Argon, 0.03 Carbon Dioxide.
The Hydrosphere is the most fluid of all the spheres. The ocean itself covers 71 percent of the Earth's surface and contains 97 percent of the planet's water, this being said there is more than 95 percent of the underwater world that still to this day remains unexplored. The water cycle plays an integral role in many of the Earth's systems including climate and weather.