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4-1 & 4-2

QuestionAnswer
The evidence that was found after Wegner was dead that proved his theory was correct was_______. Sea Floor Spreading
What was not used as evidence to support Wegner's theory of continental drift? the existence of convection currents
Wegener's continental drift theory suggest that about 180 million years ago, Pangaea gradually broke into two big pieces that were called______. Ganwanna and Laurasia
The ancient continent that contained all the landmasses is called______. Pangaea
Why was Wegener's theory of continental drift not accepted at first? He couldn't prove there was a force strong enough to move continents
The solid, dense center of our planet is called the_____. Inner core
The soft layer of the mantle on which pieces of the lithosphere move on top is called the ______. asthenosphere
The outermost, ridged layer of the Earth is called the_______ lithosphere
Earth's oceanic crust is______ than the continental crust. thinner but denser
Which of the following makes up most of the Earth's mass? mantle
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