| A | B |
|---|
| asthenosphere | Semi-molten upper part of the mantle where convection occurs |
| collision boundary | Two continental plates are converging and hitting each other creating mountains |
| continental drift | Theory proposed by Alfred Wegener stating that continents were once joined together |
| convection | Heat transfer within a liquid or gas |
| convergent boundary | Two plates colliding. One plate subducts underneath the other plate |
| crust | Outermost layer of the Earth. We live on this |
| divergent boundary | Two plates moving away from each other |
| lithosphere | Layer of Earth that contains the crust and uppermost part of the mantle |
| mantle | Layer of the Earth that extends from the crust to the outer core |
| mid-ocean ridge | Feature of a diverging boundary at the bottom of the ocean floor. Volcanoes create a series of volcanic mountains |
| Moho | Boundary between the crust and mantle. Named after the scientist who discovered it. |
| Pangea | Super-continent around 300 million years ago |
| plastic | Refers to the consistency of the asthenosphere. Similar to silly putty or gum. |
| Plate Tectonics | The idea that the crust is made up of plates and they are moving around due to convection in the asthenosphere |
| rift | The exact point where two plates are diverging. Lava usually is located here. |
| rift valley | A land feature created when two plates diverge. |
| subduction | Process that takes place when a plate slides under another plate. |
| subduction boundary | A specific converging boundary. One plate goes under the other plate as they collide. |
| transform boundary | General area where two plates slide past each other, creating earthquakes. |
| transform fault | Exact location of rock movement at a transform boundary. |
