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Earth's Layers #1
Land Beneath Our Feet Unit
| Term | Definition |
|---|---|
| inner core | a ball of hot, solid metals |
| outer core | a layer of liquid metals that surrounds the inner core |
| mantle | the Earth's thickest layer; made up of hot rock |
| crust | a thin layer of cool rock that surrounds Earth |
| lithosphere | Combination of the Earth's crust and the very top of the mantle - it is the most rigid of all the layers |
| asthenosphere | a layer of hotter, softer rock in the upper mantle that flows |
| tectonic plates | lithosphere that is broken |