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Plate Tectonics
| Question | Answer |
|---|---|
| Where does convection occur inside Earth? | Astenosphere |
| What is the source of these convection currents? | Heat from Earth’s core |
| What is the thinnest layer of Earth? | Crust |
| Thickest layer? | Mantle |
| What is the crust composed of? | Solid rock |
| What is the thickness of this layer? | 5-100km |
| Where do most volcanoes / volcanic activity, faults and earthquakes occur? | At plate boundaries |