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By: Robbie Himebaugh. Plate Tectonics. History Of Pangaea part 1. Q:Who originated the theory of Pangaea? A: Alfred Wegener. His theory of continental drift suggested that that continents were all at one time 1 super continent. - PowerPoint PPT Presentation
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PLATE TECTONICSBy: Robbie Himebaugh
History Of Pangaea part 1 Q:Who originated the theory of
Pangaea? A: Alfred Wegener. His theory of
continental drift suggested that that continents were all at one time 1 super continent.
Q: Was the theory of a ‘super continent’ originally accepted by scientists?
A: No, not all the scientists did, only half.
Q:What does Pangaea mean? What time period did it occur?
A: Pangaea means ‘all lands’. It occurred 300 million years ago during the Carboniferous period.
History of Pangaea part 2
Q: What other theories were around when Wegener introduced his? A: The other theory was that the earth was left in it’s current state
after many cycles of the earth cooling and heating. The scientists who believed that were called mobiltists.
Q: Alfred Wegener was accomplished in astronomy, meteorology, and climatology. How do you think these sciences helped him with his theory of Pangaea?
A: By studying other planets and how the formed, that could help him how the earth was formed. Climatology and meteorology would help him see how the earths climate and weather has changed and stayed the same over time all across the earth.
Q: Who's ideas later helped Wegener's theory. How did this relate to his original findings
A: Arthur Holmes later came up with the lithosphere which is a hot liquid like layer under the earth that is always moving , helping Wegener's theory of continental drift. Vocab: plate-large landmass
Convergent Boundaries
Convergent boundary: 2 plates moving in opposite directions meet and one is dragged down beneath the other (sub ducted)
When this happens, a trench is formed
Ex: Aleutian trench- Pacific plate is sub ducting under the North American plate
Vocab: Trench- deep crack in earth
Divergent Boundaries Divergent boundary: 2 adjacent plates pull apart Volcanic islands, valleys, and mountains can form
when this occurs Ex: Mid Atlantic ridge- separates the North and South
American plates from Eurasian and African plates Vocab: Volcano-large tube of magma at ground level Mountain- a huge hill that gradually gets stepper
Transform Boundaries
2 plates slide horizontally past each other
An earth quake, mudslides, landslides
Ex: San Andreas fault. Still sliding today and causing earth quakes
Vocab: Earth Quake- mild to violent shaking of the ground
Mudslide- tons of mud falling down Landslide- land/earth that is falling
Real World Connections
We live on the north American plate Our boundary plates include Eurasia,
African, Cocas, Caribbean, and Pacific Cincinnati is not in any danger. Hawaii is
in danger of volcanoes. The area around the San Andreas fault and Yellow stone are because the San Andreas fault is still causing earth quakes and Yellow stone is a giant volcano that will explode. (yellow stone isn’t expected to go off soon)
Work Cited
vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html
www.ucmp.berkeley.edu/geology/techist.html
scign.jpl.nasa.gov/learn/plate2.htm www.dictionary.com