| A | B |
|---|
| What global temperature changes can be caused by volcanic ash and gases? | Less sunlight makes tempatures drop. |
| Which volcano has layers of lava from nonexplosive eruption? | shield volcano |
| What volcano has steep slopes made of pyroclastic material? | cinder cone volcano |
| What volcano is formed by explosive eruptions of pyroclastic material followed by lava flows? | composite volcano |
| Lava can erupt from a long crack in the Earth's crust called a __________. | rift |
| What is a funnel-shaped pit around a volcano's central vent is called? | creater |
| What does repreated eruptions of lava over a large area form? | lava plateau |
| When a roof over a magma chamber collapses, it forms a _________. | caldera |
| What are the three main types of volcanoes? | shield, cinder cone, and composite |
| Why do cinder cone volcanoes erode quickly? | The pyroclastic material is loose and not stuck together. |
| What is the largest kind of volcanic landform? | lava plateau |
| Why do shield volcanoes have wide bases? | The lava is thin and runny. Therefore, it spreads out in thin layers over a wide area. |
| How is a creater different from a caldera? | Caladeras are much larger. |
