| A | B |
|---|
| Inner Core | Solid iron-nickel center of the earth. |
| Outer Core | Liquid part of center (2900km to 5100km deep). |
| Mantle | Molten rock (100km to 2900km deep). |
| Crust | Outer layer of the Earth (0km to 100km deep). |
| Lithosphere | Outer Earth layer made up of the crust and the solid part of the mantle. |
| Asthenosphere | The less dense magma at the top of the mantle. |
| Pangaea | Greek for "All Lands." |
| Continental Drift | Theory that the continental plates have moved over the past 135 million years. |
| Fossil | Bones or imprints of ancient animals and plants. |
| Rift Valley | The build-up of cooled magma at divergent boundaries. |
| Alfred L. Wegner | German scientist/explorer who developed theory of Continental Drift |
| Meteorology | Scientific study of weather phenomena. |
| Astronomy | Scientific study of the stars and outer space. |
| Paleontology | Scientific study of ancient human, animal, and plant life. |
| Geology | Scientific study of the earth and its life processes. |
| Epicenter | The central point where an earthquake unleashes its greatest force. |
| Divergent Boundaries | Where two plates move apart creating a continuous rift. |
| Convergent Boundaries | Where two plates come together to form trenches or mountains. |
| Transform Boundary Faults | Where two or more plates slide slowly against each other causing earthquakes and volcanos. |
| Earthquake | The release of the pent-up geologic energy along a transform or convergent boundary. |
