| A | B |
|---|
| magma | molten rock inside the earth's crust |
| atmosphere | a layer of gases surrounding the earth |
| continental drift | the hypothesis that all continents were once joined in a super continent then over millions of years they split apart |
| drainage basin | area of land drained by a major river and tributaries |
| relief | the difference in elevation of a landform from the lowest to the highest point |
| tectonic plate | an enormous moving shelf that forms the earth's crust |
| earthquake | the violent movement of the earth, caused by the tectonic plates grinding or slipping past each other at a fault |
| tsunami | giant ocean wave caused by an underwater earthquake |
| volcano | formed when magma, gases, and water from inside the earth erupt and pour out through the earth's crust |
| lava | magma that has reached the earth's surface |
| ring of fire | chain of volvanoes that line the Pacific Rim |
| weathering | physical and chemical processes that change the characteristics of rocks on or near the earth's surface and over a preiod of time |
| erosion | the results of weathering on matter, caused by the action of wind, water, ice or gravity |
