| Term | Definition |
|---|
| Pangaea | Present continents were joined in a single huge continent "all the earth". |
| Continental drift | Wegener's theory that the continents slowly moved over Earth's surface. |
| Fossil | It is any trace of an ancient organism preserved in rock. |
| Plate tectonics | It explains that the earth is divided into pieces in the lithosphere that move around on top of the asthenosphere. |
| Trench | Narrow depression in the ocean floor. |
| Fault | A crack in the earth's crust. |
| Rift | A fault. |
| Subduction | The process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture (subduction zone) of two plates. |
| Glossopteris | Fossil plant that helps support the theory of continental drift |
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