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THE EARTH'S LAYERS
Question | Answer |
---|---|
dense and solid | Inner Core |
molten or liquid | Outter Core |
A thick layer of rock about 1,800 miles thick. | Mantle |
Rocky surface layer | Crust |
liquid that breaks through the earth’s crust. | Magma |
the molten rock or magma once its on the surface | Lava |
This theory explains the movement of the Earth's plates. Explains the cause of earthquakes, volcanoes, oceanic trenches, mountain range formation, and many other geologic phenomenon's | Plate Tectonics |
Where plates collide, the crust crumples and buckles into mountain ranges. | Convergent Boundaries |
Magma from deep in the Earth's mantle rises toward the surface and pushes apart two or more plates. Mountains and volcanoes rise along the seam. | Divergent Boundaries |
Two plates grind past each other, triggers large earthquakes | Transform Boundaries |
One plate moves under another at about 1 to 10 centimeters a year. Earthquakes and Volcanoes are a result. | Subduction |
German explorer who created the continental drift theory | Alfred Wegener |
The movement of the Earth’s continents | Continental Drift |
supercontinent that broke apart and formed the 7 continents | Pangaea |
A circle of Volcanoes surrounding the Pacific Ocean floor | The Ring of Fire |