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EARTH LAYERS
| Term | Definition |
|---|---|
| Crust | the thin and solid outermost layer of the Earth above the mantle |
| Mantle | the layer of rock between the Earth's crust and core |
| Core | the central part of the Earth below the mantle |
| Inner core | the absolute center of the Earth; although hot, pressure from the above layers causes this layer to be solid |
| Outer core | the liquid layer that surrounds the solid inner core; it is liquid because it does not have as much pressure on it |
| Lithosphere | the solid, outer layer of the Earth that contains the crust and the rigid upper part of the mantle |
| Asthenosphere | the soft layer of the mantle on which the tectonic plates move |
| Mesosphere | the strong, lower part of the mantle between the asthenosphere and the outer core |
| How thick is the crust? | 5-60 km thick |
| How thick is the mantle? | 2900 km thick |
| How thick is the outer core? | 2200 km thick |
| How thick is the inner core? | 1400 km thick |
| What causes plates to move? | convection currents |
| What is the thinnest layer? | Crust |
| What is the thickest layer? | Mantle |
| What minerals can be found in the crust? | Oxygen and Silicon |
| What minerals can be found in the mantle? | Iron, Silicon, Oxygen, and Magnesium |
| What minerals can be found in the inner and outer core? | Iron and Nickel |
| List the three mechanical layers. | Lithosphere, Mesosphere, and Aesthenosphere |
| List the four compositional layers. | Crust, Mantle, Inner core, and Outer core |
Created by:
littleduck14
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