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…
1. Chapter 9 Plate tectonics 2. An Idea Before Its Time An Idea Before Its Time 1915 – _____________ proposed a radical idea he called__________________ .Wegener’s continental…
1. 4.2The Earth 2. Terrestrial compositionThe four terrestrial planets all have similar internal features:Dense, metallic coreLess dense, liquid-like mantleLow-density, solid…
Slide 1 Plate tectonics: What the Future Holds The Changing Continenets Slide 2 Reshaping Earth’s Crust The following changes may occur because the plates are still moving…
UNIT SIX: Earthâs Structure Chapter 18 Earthâs History and Rocks Chapter 19 Changing Earth Chapter 20 Earthquakes and Volcanoes Chapter Eighteen: Earthâs History and Rocks…
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,…
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…
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…
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…