| A | B |
|---|
| volcano | opening in Earth's crust where melted rock reaches Earth's surface |
| mantle | a solid layer of Earth between the outer core and the crust |
| crust | the top layer of Earth; its surface |
| Plates | the moving sections of the outer part of the Earth |
| plate tectonics | the theory that the Earth's surface is made up of plates that move |
| hot spot | A very hot area of the earth's mantle right below the crust |
| Theory | A set of ideas that tries to explain why certain things happen |
| Geyser | A natural fountain of hot water and steam that rises suddenly into the air |
