| A | B |
|---|
| Fault-block Mountain | A mountain that forms as blocks of rock move up or down along normal faults in areas where the lithosphere is being pulled apart. |
| Folded Mountain | A mountain that forms as continental crust is compressed and rocks bend into large folds. |
| Volcano | An area where a column of hot material rises from deep within a planet’s mantle and heats the lithosphere above it, often causing volcanic activity at the surface. |
| Lava | Molten rock that reaches a planet’s surface through a volcano. |
| Pyroclastic Flow | A dense cloud of superheated gases and rock fragments that moves quickly downhill from an erupting volcano. |
| Acid Rain | Rain that has become more acidic than normal due to pollution. |
| Geyser | A type of hot spring that shoots water into the air. |
