160 likes | 250 Views
Changes within the Earth. Geology. Study of Earth’s physical structures and the processes that created them. Earth. Four zones Inner core Solid iron Outer core Liquid metals (iron and nickel) Mantle Most of Earth’s mass Channels of heat from core to crust Crust Up to 25 miles deep.
E N D
Geology • Study of Earth’s physical structures and the processes that created them.
Earth • Four zones • Inner core • Solid iron • Outer core • Liquid metals (iron and nickel) • Mantle • Most of Earth’s mass • Channels of heat from core to crust • Crust • Up to 25 miles deep
Earth’s Four Spheres • Atmosphere • Lithosphere • Hydrosphere • Biosphere
Atmosphere • Envelope of gases surrounding Earth • 78% nitrogen • 21%oxygen
Lithosphere • Solid crust of planet • Includes rock and soil • Forms continents, islands, and ocean floors
Hydrosphere • All of Earth’s water • Solid • Liquid • Gas
Biosphere • Includes all life forms • Plants • Animals • Overlaps other three spheres
Plate Tectonics • Explains how forces inside Earth create landforms • Crust is divided into tectonic plates • 14 major • 38 minor • Continental drift • Process by which plates move • Melting • Bending • Breaking
Pangea • http://www.classzone.com/books/earth_science/terc/content/visualizations/es0806/es0806page01.cfm?chapter_no=visualization
Plate Movement • Three types • Spread apart • Rift valleys • Abyssal plains • Collide • Trenchs • Folds • Faults • Move laterally • Fractures • Earthquakes
Ring of Fire • http://grooveshark.com/#!/s/Ring+Of+Fire/3pfpnW?src=5