| A | B |
|---|
| 1-4 inches per year | plate movement |
| Pangaea | continents were once joined |
| surface of earth | is in constant motion |
| earthquakes | occur where stress has been built up by plates moving in opposite directions against each other |
| Richter scale | measures energy released from an earthquake (intensity) |
| Mercalli scale | measures damange to structure and people |
| volcanoes | occur where plates are pulling apart or coming together |
| theory | explanation generally accepted as truth, but not yet proven |
| Greek means "all land" | Pangaea |
| continental drift theory | Pangaea split up and pieces drifted into present locations and will continue to move |
| Laurasia | major continent to the north after Pangaea |
| Gondwanaland | major continent to south after Pangaea split up |
| continents fit together like puzzle pieces | evidence to support Continental Drift Theory |
| Evidence to support Continental Drift Theory | similar rock types in South American and African mountains |
| Rock of Gibraltar | evidence for Continental Drift Theory: only place monkeys live in the wild in Europe |
| Crust | 930 degrees, 5-25 miles, solid |
| mantle | 4000 degrees, 1800 miles, magma |
| outer core | 9000 degrees, 1400 miles, nickel and iron, liquid |
| 12600 degrees, 800 miles, iron and nickel | inner core |
