| A | B |
|---|
| inner core | solid, innermost layer of Earth |
| outer core | second layer of Earth; hot liquid |
| mantle | layer of Earth directly above the outer core |
| Moho | boundary between the Earth's outermost layer and the mantle |
| plasticity | solid has the ability to flow |
| crust | thin outermost layer of the Earth |
| lithosphere | solid topmost layer of the Earth |
| asthenosphere | layer directly beneath the lithosphere |
| geologist | person who studies structure,composition, & history of the Earth |
