(par 3. 4 ) Energy Flow in an Ecosystem
http://www.biologydiscussion.com/ecosystem/energy-flow-in-an-ecosystem-with-diagram/6740 Energy has been defined as the capacity to do work. Energy exists in two forms potential and kinetic. Potential energy is the energy at rest {i.e., stored energy) capable of performing work. Kinetic energy is the energy of motion (free energy). It results in work performance at the expense of potential energy. Conversion of […]
(par 3. 3.3.2) Recycling of Matter in an Ecosystem
by Joseph West, Demand Media http://everydaylife.globalpost.com/recycling-matter-ecosystem-34660.html Undisturbed natural ecosystems are able to maintain a vibrant diversity of life because they incorporate intricate recycling systems that conserve essential materials. These materials include mineral nutrients, such as nitrogen or phosphorus, and important biological substances such as water or oxygen gas. Unlike energy, which generally flows into and […]
(par 3. 3.3 ) Rock Cycle
http://www.edu.pe.ca/southernkings/igneousjj.htm The rock cycle is an ongoing process, beginning as rocks are pushed up by tectonic forces, and eroded by wind and rain. The eroded rocks travel by wind or moving water until they are deposited, settling into layers. Additional eroded rocks may bury these layers until heat and pressure change the underlying layers to […]