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| The centre of the earth | Core |
| The thin layer at the earth's surface | Crust |
| The molten layer surrounding the earth's core | Mantle |
| Where two plates move parallel (side by side) to each other | Conservative Boundary (Transform Fault) |
| Where two continental plates are moving together | Collision Boundary |
| Where an oceanic and continental plate are moving together | Destructive (convergent) Boundary |
| Where two plates are moving away from each other | Constructive (divergent) Boundary |
| The place where two plates meet | Plate Margins |
| The point at whihc one plate is dragged under another | Subduction zone |
| Large slabs of the earths crust which move across the globe on top of the mantle below | Tectonic Plates |
| A sudden movement within the earth's crust | An earthquake |
| Point on the earth's surface directly above an earthquakes focus | Epicentre |
| The point where an earthquake starts underground | The Focus |
| Where the ground turns to a liquid state as water is shaken up from below | Liquefaction |
| The direct effects of an earthquake e.g. building collapsing | Primary effects |
| The indirect effects of an earthqukae - e.g. fire caused by broken gas main | Secondary effects |
| A graph measuring and recording the intensity of an earhtquake | Seismograph |
| The amount of energy released by an earthquake | Magnitude |
| The scale used to measure the magnitude of an earthquake | Richter Scale |
| A dense burning avalanche of hot gases, volcanic fragments and ash | Pyroclastic flow |
| Molten rock on the earth's surface | Lava |
| Molten rock under the earth's surface | Magma |
| An opening at the earth's curst through which lava and ash may be ejected | Volcano |