Earth's Interiors Flashcards
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22 terms
Terms | Definitions |
|---|---|
 Seismic Waves | Vibrations that travel through Earth carrying the energy released during an earthquake |
| Crust | The layer of solid rock that includes both dry land and the ocean floor |
| Mantle | The layer of rock on Earth that is very hot, but solid and is divided into three layers |
| Lithosphere | A rigid layer of Earth that is the uppermost part of the mantle and the crust together |
| Asthenosphere | The soft, middle layer of the mantle |
| Lower Mantle | The lowest level of the mantle that extends to the Earth's core |
| Outer Core | The layer of molten metal that surrounds the inner core |
| Inner Core | A dense ball of solid metal found at the center of the Earth |
| Magnetic Field | This is formed by the movements in the liquid outer core in the middle of the Earth |
| Convection | Heat transfer by the movement of currents within a fluid |
| Continental Drift | The theory that continents slowly moved over Earth's surface |
| Fault | A break in Earth's crust where masses of rock slip past each other |
| Subduction | The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary |
| Plate | A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust |
| Geologists | Scientists that study the Earth and its features inside and out |
| Transform Boundary | A plate boundary where two plates move past each other in opposite directions |
| Convergent Boundary | A plate boundary where two plates move toward each other |
| Divergent Boundary | A plate boundary where two plates move away from each other |
| Density | The amount of mass in a given space |
| Lithosphere | A rigid layer made up of the uppermost part of the mantle and the crust |
| Rift Valley | A deep valley that forms where two plates move apart |
| Pangaea | The name of the single landmass that borke apart 200 million years ago and gave rise to today's continent |
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