Plate Tectonics Continental Drift Theory Theory of Plate Tectonics Plate Boundaries.
Layers of the Earth and Plate Tectonics Activity
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Transcript of Layers of the Earth and Plate Tectonics Activity
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Layers of the Earth and Plate Tectonics Activity
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What is Geology• Geo- Earth• Ology is the study of
• This activity will help us study the earth by learning what it is made of and how it can be changed
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4 layers of the Earth
1. Crust2. Mantle3. Inner core4. Outer core
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Milky Way- cut in half
• Chocolate- crust- thinnest layer made of rocks and soil (land we walk on and under the sea)
• Caramel- mantle- holt molten rock, what would come out of a volcano
• Light brown layer- outer core- liquid iron• Bottom layer of chocolate- inner core, solid
iron and is the hottest layer (almost as hot as sun)
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Plate Tectonics
• Plates- large section of the Earth’s crust that slowly move over partially melted rock in the upper mantle
• This movement explain how the Earth’s surface has changed over time and we can predict how it will change in the future
formation, movements, collusions, destruction of Earth’s crust
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PT- Activity
• Frosting- mantle• Graham cracker- crust1 Spread frosting on wax paper2 Place 2 graham cracker on frosting – make
sure they are touching
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Divergent Plate Boundary• Move plates apart to expose mantle
spreading zone. • When plates move apart, it creates cracks in
the Earth called rift valley• Allows hot, melted rock to come up through
the cracks volcano opening is formed• Sea floor spreading- new sea floor created• http://geology.com/nsta/divergent-boundary-
oceanic.gif
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Convergent Plate Boundary
• Push plates back together until the middle forms a ridge
• When plates collide they create mountains this is called a collision zone
• Appalachian mountains – Africa collided with North America during formation of Pangea
• Destroy sea floor- ocean plates more dense than land plates, when they converge ocean plates slide under land plates
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3 sub types
• Ocean to ocean• Ocean to continental • Continental to continental
• http://geology.com/nsta/convergent-plate-boundaries.shtml
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Transform Plate boundary• Slide the edges of plates against each other• This horizontal grinding and sliding of the
plates causes earthquakes• This is called a shearing fault• A fault is a fracture in the Earth’s crust• New Madrid Fault- runs along the eastern
border of Missouri• San Andreas Fault- most studied
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