Page 124 - Science Course 2 (Book 2)
P. 124
Mo11-L1a: What is Plate Tectonics?
Key Concept
What is Plate Tectonics?
What evidence do scientists use to support the
theory of plate tectonics?
Pangaea
Laurasia & Gondwana
Convection affects the mantle underneath tectonic
plates.
Hotter mantle rises toward Earth’s surface and
cooler mantle sinks deeper into the mantle.
Modern World
As the Earth’s mantle moves, it pushes and pulls
tectonic plates over Earth’s surface.
SUMMARY
What is Plate Tectonics?
Evidence of continental drift includes fossils, mountain ranges, rock types, and the shapes of
continents.
Earth’s crust is broken into pieces called tectonic plates. Convection currents in the mantle cause
the plates to move.
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