Page 123 - Science Course 2 (Book 2)
P. 123
Mo11-L1a: What is Plate Tectonics?
In 1912, Alfred Wegener developed the hypothesis
that continents move, called continental drift.
One piece of evidence is the shape of Earth’s
continents.
INDIA
(today)
38 million years ago
Fossil and rock evidence from the Gondwana
continents also supports the hypothesis of
51 million years ago continental drift.
Geologists have discovered the same types of
fossils on continents that are now separated by
vast oceans.
India Land Mass
71 million years ago
Key Concept
What is Plate Tectonics?
What is the theory of plate tectonics?
Long before geologists proposed the theory of plate
tectonics, they discovered evidence of continental
movement.
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