The study of the environment is influenced by many sciences including Ecology which looks at species interactions within an ecosystem, Earth Science also sometimes called Geosystems which focus's on the interactions between the Earth's primary systems the hydrosphere or water, the geosphere or soil, earth and dirt, the air or atmosphere and the biosphere or the living systems, Chemistry, which focus's more on the chemical components or interactions on a chemical level of the components of the environment and Biology which looks at how the physiology and other factors of creatures can alter or be altered by the environment itself.