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Earth Science 1
Science Fusion - Unit 4 Flash Cards
Question | Answer |
---|---|
What are the three compositional layers of the Earth? | Core, mantle, and crust. |
What are the two types of crust? | Continental and oceanic. The oceanic crust is denser, both contain elements of oxygen, silicon, and aluminum. The oceanic crust has twice as much iron, calcium, and magnesium. |
Define the mantle. | It is made of hot, slow-flowing, solid rock. It is between the crust and core. |
Define the process that occurs in the mantle when cooler rock sink and warmer rock rise to the surface. | Convection. |
What are the five physical layers of Earth? | Lithosphere, Asthenosphere, Mesophere, Outer Core, and Inner Core. |
What is the lithosphere divided into? | Tectonic plates. |
What physical layer do tectonic plates move on top of? | Asthenosphere, |
How were the continents formed? | From the land-mass Pangea. |
What do plate tectonics describe? | The large scale movements of Earth's lithosphere. It explains how and why features of Earth's crust form and continents move. |