| A | B |
|---|
| caldera | a large, bowl-shaped basin where the land has collapsed into an empty magma chamber |
| cinders | light, black-colored rocks or pebbles formed by small pieces of flying lava and ash |
| composite volcano | an explosive volcano made of different layers of ash and lava |
| crater | a bowl-shaped hollow area in a volcano where lava, ash, and gasses come out |
| dormant | quiet for many hundreds of years |
| extinct | has not erupted in thousands of years and shows no sign of future eruptions |
| lava | melted, liquid rock on the surface of the earth |
| magma | melted, liquid rock beneath the surface of the earth |
| plates | the large sheets of rock that make up the earth's crust |
| shield volcano | a non-explosive volcano made of hardened lava |
| surge cloud | a fast, super heated cloud of ash, gas, dust, and rock that moves along the ground |
| vents | tubes through which magma travels to the surface of a volcano |
