plate tectonics – chapters 10, 11, 12 movements of the...
TRANSCRIPT
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Objectives: S.W.B.A.T.
• Introduction of crustal movement
understand and state evidence that shows
crustal movement
• How does crustal movement affect human
lives
• Define a bench mark and what it tells us
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Activities:
• Notes/discussion present and past crustal
movement
• Video natures fury
• Model construction – Weathering/Erosion
• Missing letters chap. 11
• notebook organize to be turned in by end
of week - work on any missing work
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Plate Tectonics – chapters 10, 11, 12 Movements of the Crust & Crustal Features
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Evidence the Crust moves today:
1. Earthquakes 150,000 each year
2. Volcanic eruptions
3. Bench marks that have changed elevation
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• Benchmark – locations on earth that its elevation has been measured very accurately. (bridges, dams, airports)
4. Displace structures: (buildings. Roads, train tracks)
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Evidence of past crustal motion:
1. Distorted layers of rock (sedimentary rocks
that are bent)
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2. Sedimentary rocks in high elevations
(fossils out of place, seashells on top of Mts.
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Today’s technology helps to tell very
small crustal movements
Example: LAGEOS – laser geodynamic
satellite bounces a beam off the earth and
records any changes in the movement of the
crust – also G.P.S. data helps prove crust movement
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http://earthquakestoday.info/
http://earthquake.usgs.gov/earthquakes/dyfi/