Geology is the study of the Earth, rocks and how they change. Geology also tries to study these features on other planets. Geology has allowed scientists to study the history of the Earth; it provided evidence that led to the discovery of plate tectonics, the discovery of the evolutionary history of life and the past climates of the Earth. Geology has many applications. These applications range from being commercially important to publicly important. The applications include mineral and hydrocarbon exploration, natural hazard predictions, remediation of environmental problems and studying climate change.
Geology also places a large focus on studying the Earth structures. Due to advances in technologies the internal composition and structure of the Earth has been found and mapped. The Earth's internal core is maintained at an extremely high temperature and pressure which has turned the rock into molten lava. Mineralogists used this data to find the elemental composition of the Earth. These breakthroughs have allowed scientists to exploit these mineral resources for commercial uses.
Furthermore, another important concept in the study of geology is the geological time scale. This time scale is extremely important as it states the history of the Earth and has some evidence on the formation of the universe. The Earth has been found to be 4.54 billion years old. These years have been divided up into eons, eras, and periods to describe the properties of those time periods.
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