Imagine the earth as a big machine where the chemical elements essential for life, such as carbon, nitrogen, oxygen, phosphorus and sulfur, constantly travel between living beings and the environment.

This week, in Ecology 121 - We are learning about Biogeochemical processes. We are required to illustrate the 3 cycles, (water, carbon and nitrogen) as they inter-relate to each other, for homework. Here

In an ecosystem, the material in the form of reconstituting elements of organic material is recycled. These elements enter into the biotic components through air, soil, and water. The recycles of matter