| A | B |
|---|
| magma | liquid rock produced under Earth's surface |
| volcanism | any activity that includes the movement of magma toward or onto Earth's surface |
| lava | magma that flows onto Earth's surface; the rock that forms when lava cools & solidifies |
| volcano | a vent or fissure in Earth's surface through which magma & gases are expelled |
| hot spot | a volcanically active area of Earth's surface, commonly far from a tectonic plate boundary |
| mafic | describes magma or igneous rock that is rich in magnesium & iron & that is dark in color |
| felsic | describes magma or igneous rock that is rich in feldspar & silica & that is light in color |
| pyroclastic material | fragments of rock that form during a volcanic eruption |
