Four major parts of the earth work together in a complex system
On a global scale, each part can be thought of as a sphere,
roughly the same size and shape as the planet.
These 4 speres of the earth are dependent upon each other and have been used to
make the study of biological and physiccomponents of the earth easily comprehendible.
They are scientifically called the biophysical elements.
These spheres are furthdivided into various sub-spheres.
Click on a sphere below to learn more.