warm up – page 78
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Answer this on page 78 in your notebook: Mrs. Wilson, I still don’t get _________________. Could you explain it again?. Warm Up – Page 78. P-Waves – move back and forth and through liquids and solids S-Waves – move up and down and side to side and only through solids - PowerPoint PPT PresentationTRANSCRIPT
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Warm Up – Page 78Warm Up – Page 78
Answer this on page 78 in your notebook:Mrs. Wilson, I still don’t get
_________________. Could you explain it again?
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P-Waves – move back and forth and through liquids and solids
S-Waves – move up and down and side to side and only through solids
By studying seismic waves, scientists realized the outer core is liquid
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Temperature, pressure, and density all increase
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Because of the intense pressure
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In the ocean – oceanic crust
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The lithosphere
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The asthenosphere
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Inner core – solid and outer core – liquid
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The movement of the liquid outer core
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Lower mantle
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All the continents were once part of a supercontinent. The continents separated and drifted to their present locations over time.
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He could not explain the mechanism that could move the continents
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Geologic – fit of South America and AfricaFossil – various fossils found in places
where the animals could not have traveled by water
Climate – tropical climate fossils found in cold areas; glacier deposits in Africa
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Mountains formed at oceanic-oceanic divergent plate boundaries
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As plates diverge, the sea floor spreads – or becomes larger; on the other side of the world, plates subduct so that the earth does not get larger
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Older rocks were farther from the ridge and younger rocks were near the ridge
The magnetic patterns in the rocks from the magnetic field reversals
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Deep ocean trenches are created at subduction zones as the older piece of plate once again becomes part of the mantle
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Oceanic crust – more dense – basaltContinental crust – less dense - granite
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The plate that is more dense will subduct under the less dense plate; trenches, volcanoes, and mountains can form
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Divergent – two plates move away from each other
Convergent – two plates move towards each other
Transform –two plates slip past each other
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Mountain ranges
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Deep ocean trenches and volcanic mountain ranges
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Deep Ocean Trenches, Volcanoes, and Island Arcs
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Rift valleys and volcanoes
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Essay - DiagramEssay - Diagram
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Essay - WrittenEssay - Written