Astronomy – Assignment Example

Why is Earth geologically active? We can trace Earth’s habitability from the fact that by itself, it is a heat engine that remains geologically and biologically active. The two great sources of Earth’s energy, the molten core that drives the geology and the sun’s energy help drive life and the atmosphere, making it habitable and ideal for biological life (www.physics.sfasu.edu). The earth’s geologically activities make heat escape from the interior, providing energy for the formation of mountains valleys making it biologically active as well (Abell, Morrison, and Wolff, 1992). The plate tectonics has controlled the evolution of earth for at least three generations creating a bimodal topoghphy distribution on earth on both high continents and low ocean basins as well as interconnected system of ridges and mountain belts at plate boundaries (Mcfadden, Weissman, and Johnson, 2007).
The convection of heat from the planets interior makes the earth geologically active, especially among the boundaries between the tectonic plates (that are noted to be the most geologically active regions of the planet) where internal heat is being driven (www.physics.sfasu.edu). The Earth’s convection is linked to the processes via the geological activities of plate tectonics. The water’s presence in the interior of earth acts to reduce the strength of the rock which in turn allows the exterior shell of the earth to be broken up into plates (Mcfadden, Weissman, and Johnson, 2007). Plate tectonics are one of the unique features of Earth on which people depend for survival; the internal heat that drives the plate tectonics allowed volcanic out-gassing to lead to our oceans and atmosphere helping regulate our climate through the carbon dioxide cycle (http://csmres.jmu.edu). These are things that are not present in other planets, (like Venus for example) that Earth is blessed to have for living things to survive.
References:
1. n.p. http://csmres.jmu.edu. The Heat History of the Earth. September 05, 2000. Web. April 12, 2010.
2. Wesley, Addison. http://physics.sfasu.edu. The Terrestrial Planet: Chapter 7. n.d. Pearson Education. Web. April 12, 2010.
3. Mcfadden ,Lucy-Ann Adams, Paul Robert Weissman, and Torrence Johnson .Encyclopedia of the Solar System 2nd Edition. USA. 2007. Print.
4. Abell , George Ogden, David Morrison and Sidney Wolff. Realm of the Universe. Saunders College. 1992. Print.