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I n the beginning … water covered the Earth. Out of the water emerged an island, a single giant mass of land; an ancient supercontinent called Pangaea. Over billions of…

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1. 4.2The Earth 2. Terrestrial compositionThe four terrestrial planets all have similar internal features:Dense, metallic coreLess dense, liquid-like mantleLow-density, solid…

Documents UNIT SIX: Earth’s Structure Chapter 18 Earth’s History and Rocks Chapter 19 Changing Earth ...

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PLATE TECTONICS Plate Tectonics According to Alfred Wegener, the super-continent of Pangea began to break up 200 million years ago with the continents attaining the size,…

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Slide 1 October 27,2011 Objective To learn how the geologic timeline was made and how the length of the various periods are different Agenda Progress reports – need to…

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Plate Tectonics According to the theory of plate tectonics, the earthâs outer shell is not one solid piece of rock. Instead the earthâs crust is broken into a number of…

Documents The four terrestrial planets all have similar internal features: Dense, metallic core Less dense,....

4.2 The Earth 4.2 The Earth Terrestrial composition The four terrestrial planets all have similar internal features: Dense, metallic core Less dense, solid/plastic mantle…