2 Overview of Earth Science Earth science is the name for the group of sciences that deals with Earth and its neighbors in spaceEarth science includes many subdivisions of geology (both physical and historical) such as geochemistry, geophysics, geobiology and paleontology, as well as oceanography, meteorology, and astronomyGeology – the science that examines Earth, its form and composition, and the changes it has undergone and is undergoingOceanography – the scientific study of the oceans and oceanic phenomenonMeteorology – the scientific study of the atmosphere and atmospheric phenomenon; the study of weather and climateAstronomy – the scientific study of the universe; it includes the observation and interpretation of celestial bodies and phenomenon
3 Concept Check What are the two main areas of geology? Physical Geology and Historical Geology
4 Formation of EarthEarth is one of eight planets and many dwarf planets that revolve around the sunThe nebular hypothesis suggests that the bodies of our solar system evolved from an enormous rotating cloud called the solar nebulaIt was made up mostly of hydrogen and helium, with a small percentage of heavier elementsShortly after Earth formed, heat caused the interior to partially melt, allowing the heavier elements to sink towards the middle, and the lighter elements to float towards the surface, creating layers
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