Earth Science Essay

882 Words Mar 15th, 2013 4 Pages
1. Summarize advances over time in determining the age of the Earth, including the importance of the discovery or radioactivity.
Herodotus counted layers of earth near the Nile River in 450 B.C.E. The Bible was used in the Middle Ages to compute the age of the Earth. The 18th and 19th centuries brought a more scientific look into determining the age of the Earth by studying the salinities of the oceans, the rates of sedimentation, and models of cooling of different materials in order to calculate the Earth’s age. In 1862, William Thompson calculated the Earth’s age to be 98 million years and recounted that age to determine that it was actually between 20 and 40 million years old. He used a very thorough method and ended up being wrong on
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This report shoes the convection of heat and rock that is occurring inside the Earth. This convection makes its way to the surface of the Earth which shifts the plates at the weak points. This moves those plates with sometime violent and dangerous results. The plates “ride” on more unstable parts of the Earth’s asthenosphere. The subduction zones allow rock to be moved downward as warmer rock moves up. 5. Explain how the laws of thermodynamics determine the motions that result in the formation of mountains and oceans.
1st law: Energy can be moved from one form to another but cannot be created or destroyed. This allowed for matter to be created from energy which was a preamble to the creation of the Solar System and most of the Universe; including mountains and oceans.
2nd Law: Energy of an object at the initial state is greater than then energy of that object at any other time; provided no new energy is introduced to the object. This law is the reason the conveyer belt theory works. Rocks on the mountains are washed to sea by water that was evaporated from the oceans to create rain which runs back out to the sea (carrying rock) to the subduction zones that will sink to the core which will heat the rock which will move to the colder area (the surface of the planet) causing a violent movement which pushes plates into each other creating

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