Chapter Six Plate Tectonics.docx

Chapter Six Plate Tectonics.docx - Chapter Six Plate...

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Chapter Six Plate Tectonics By. Sawyer Tuinstra
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Vocabulary Section One Crust- outer most layer of Earth, also thinnest layer and this is the layer we live on Mantle- extremely thick and contains most of Earth’s mass Core- think core is mostly made of iron Lithosphere- outer most rigid layer of Earth, nicknamed rock sphere, part of mantle, made of tectonic plates that move around on top of asthenosphere Asthenosphere- nicknamed weak sphere, soft layer of mantle, made of solid rock that flows slowly Mesosphere- strong lower part of mantle, nicknamed middle sphere Outer core- liquid layer of Earth’s core surrounds the inner core Inner core- solid dense center of our planet Tectonic plates- pieces of the lithosphere that move around on top of the asthenosphere Section Two Continental drift- theory that continents can drift apart from one another Sea-floor spreading- process by which oceanic lithosphere is created as older materials are pulled away Section three Plate tectonics- theory that lithosphere is divided into tectonic plates Convergent boundary- when two tectonic plates push into one another Subduction zone- where oceanic plates sink down into the asthenosphere Divergent boundary- when two tectonic plates move away from one another Transform boundary- when two tectonic plates slide past each other horizontally Section Four Stress- amount of force per unit area that is put on a given material Compression- occurs when an object is squeezed Tension- occurs when forces act to stretch an object
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  • Fall '14
  • Mr. Rude
  • Plate Tectonics, center of Earth, Seismic Waves, Mantle

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