| A | B |
|---|
| geologist | A scientist who studies the forces that make and shape planet Earth. |
| geology | The study of planet Earth. |
| constructive forces | A force that builds up mountains and landforms on Earth's surface. |
| destructive forces | A force that slowly wears away mountains and other features on the surface of Earth. |
| crust | The layer of rock that forms Earth's outer surface. |
| mantle | The layer of hot, solid material between Earth's crust and core. |
| 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. |
| 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 in the center of Earth. |
| basalt | type of dark, dense rock found in the ocean crust |
| granite | type of light colored rock found in continental crust |
