| A | B |
|---|
| Mantle | the middle layer of the earth, between the crust and core |
| Continental drift | A theory that the earth's landmasses moved across the earth's surface into their present position. |
| Core | The innermost layer of the earth, lying below the mantle. |
| Crust | The outermost, thinnest, and most solid layer of the earth. |
| Plate | An enormous slab of the earth's crust and rigid upper mantle. |
| Plate Tectonics | A theory that the earth's crust and rigid upper mantle move across the earth's surface due to convection currents in the partially melted mantle. |
| Fault | A group of fractures, or cracks, in the earth's surface where earthquake movements have taken place. |
| Inner Core | Beneath the outer core this layer is the innermost solid layer of the earth. |
| Continental Crust | Forms the earth's landmasses. Mountains and valleys are made of continental crust. |
| Mount Everest | The highest point on the earth's crust, located in Asia. |
| Oceanic Crust | Found below the earth's oceans. |
| Marianna Trench | The deepest point on the earth. Found in the Pacific Ocean. |
