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4-1 & 4-2
| Question | Answer |
|---|---|
| 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 |