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unit 5.1 vocab
| Term | Definition |
|---|---|
| crust | The layer of rock that forms Earth's outer surface. |
| mantle | The layer of hot, solid material between Earth's crust and core. |
| outer core | A layer of molten iron and nickel that surrounds the inner core of Earth |
| inner core | A dense sphere of solid iron and nickel at the center of Earth |
| lithosphere | A rigid layer made up of the uppermost part of the mantle and the crust. |
| asthenosphere | The soft layer of the mantle on which the lithosphere floats. |
| basalt | A dark, dense, igneous rock with a fine texture, found in oceanic crust |
| granite | A usually light colored igneous rock that is found in continental crust |
| tectonic plates | Sections of the Earth's crust that move due to convection currents. |
| continental crust | The portion of the earth's crust that primarily contains granite. |
| oceanic crust | The portion of Earth's crust that primarily contains basalt and is usually below the oceans. |
| convection currents | Circular currents in the mantle caused by the magma being heated by the core off the Earth. |
| temperature | A measure of how hot or cold something is. |
| pressure | The force exerted on a surface divided by the total area over which the force is exerted. |
| seismic waves | Vibrations that travel through Earth carrying the energy released during an earthquake |
| Moho | The zone between the crust and mantle that marks a boundary between the 2, discovered because it changes the speed of seismic waves |
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