| A | B |
|---|
| caldera | a crater formed by a collapsed volcano |
| cinders | charred bits of rock; ashes |
| composite | made up of different substances or parts |
| crater | a bowl-shaped depression |
| crust | the solid outer layer of earth |
| eruption | a volcanic explosion or large flow of lava |
| extinct | no longer active; extinguished |
| lava | hot melted rock that flows from a volcano |
| magma | hot melted rock underneath the earth's surface |
| molten | made liquid by heat |
| summit | the top of a mountain |
