chapter 4.3 drifting continents. standard s.6.1.a students know evidence of plate tectonics is...
TRANSCRIPT
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CHAPTER 4.3
Drifting Continents
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Standard
S.6.1.a Students know evidence of plate tectonics is derived from the fit of the continents; the location of earthquakes, volcanoes, and mid ocean ridges; and the distribution of fossils, rock types, and ancient climatic zones.
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Learning Goals
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Learning Goals
SWBAT know Alfred Wegener’s hypothesis about the continents.
SWBAT know what evidence supported Wegener’s hypothesis.
SWBAT explain why Wegener’s hypothesis was rejected by most scientists of his day.
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Continental drift The idea by Alfred Wegener that the continents slowly moved over Earth’s surface.
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PangaeaAccording to Wegener, the continents drifted together to form the supercontinent Pangaea. He said it existed 300 million years ago.
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fossilAny trace of an ancient organism that has been preserved in rock.
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Continental Drift
Wegener’s hypothesis was that all the continents were once joined together in a single landmass and have since drifted apart.
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Evidence of Continental Drift? Wegener gathered evidence from
different scientific fields to support his ideas about continental drift. He studied land features, fossils, and evidence of climate change.
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Wegener’s Hypothesis
Unfortunately, Wegener could not provide a satisfactory explanation for the force that pushes or pulls continents.
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Homework
Workbook Chapter 4, Section 3