Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the...
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Transcript of Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the...
![Page 1: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/1.jpg)
Continental Drift
The Earth on the Move
![Page 2: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/2.jpg)
Continental Drift Most scientists used to
believe the Earth to be a place that undergoes little change.
Oceans and land masses have been in their places since the beginning of time.
![Page 3: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/3.jpg)
Alfred Wegner Saw evidence that the
continents moved and were not locked in place like other scientists thought.
Proposed a radical new idea called continental drift.
Stated that the continents “plow” through the sea.
![Page 4: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/4.jpg)
Wegner’s Evidence
1. Continental Jigsaw Puzzle
2. Fossils that Match Across the Sea
3. Rock Types and Structures Matches
4. Ancient Climates
![Page 5: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/5.jpg)
Continental Jigsaw Puzzle
With the development of more accurate maps, scientists started to notice how the continents fit together.
Wegner proposed that this is because they once were together.
![Page 6: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/6.jpg)
Fossil Match Fossils found in one area
matched fossils found across the sea.
1. Cynognathus
2. Glossopteris
3. Lystrosaurus
4. Mesosaurus
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Rock Types Rock structures are
similar in places that seemed to be connected at one time.
Mountain belts that end in the ocean begin across the sea (Appalachian Mts. and Caledonian Mts.)
![Page 8: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/8.jpg)
Ancient Climates Evidence exists of
Glaciers in the southern hemisphere and of tropical environments in the northern hemisphere.
Was this from moving poles or moving plates?
![Page 9: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/9.jpg)
![Page 10: Continental Drift The Earth on the Move. Continental Drift Most scientists used to believe the Earth to be a place that undergoes little change. Oceans.](https://reader036.fdocuments.net/reader036/viewer/2022083007/56649de65503460f94ade331/html5/thumbnails/10.jpg)
What came from this evidence? The continental drift hypothesis and Pangaea.
Pangea—meaning 1 world. The idea that 300 million years ago, all the continents were once formed into a huge super continent.
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Where was the evidence?
Opponents of Wegner said that there was no “mechanism” to make continental drift possible.
Wegner’s idea of the continents “plowing” through the sea seemed improbable.
Wegner’s ideas were not considered reliable until a bit later…