| A | B |
|---|
| magma | melted rock in the mantle |
| lava | melted rock on the earth's crust |
| shield cone | volcanic mountain formed by gently flowing lava |
| cinder cone | volcanic mountain formed by blowing lava |
| composite cone | volcanic mountain formed by a blow and a flow |
| chamber | room in the mantle where magma collects |
| crust | outer layer of the earth made of rock and soil |
| mantle | middle layer of the earth where earthquakes and volcanoes occur |
| core | liquid and solid center of the earth |
| vent | crack in the earth's crust where lava comes out |
| obsidian | volcanic rock formed from quickly cooling lava |
| pumice | volcanic rock formed by erupting lava |
