Across
- 2. The presence of dissolved gasses in magma contributes to how explosive a volcano can be
- 3. Are small, steep sided volcanoes that erupt gas-rich, basaltic lavas
- 4. Explosive volcanoes can produce fast moving avalanches of hot gas, ash, and rock called pyroclastic
- 5. The thermal energy a volcano produces during an eruption can melt snow and ice on the summit
- 8. When two plates collide, the denser plate sinks or subducts, into the mante
- 11. A vent in earth's crust through which melted- or molten- rock flows
- 12. Large volcanic depression formed when a volcano's summit collapses or is blown away by explosive activity
- 13. Common along divergent plate boundaries and oceanic hotspots
- 14. Volcanoes that are not associated with plate boundaries are called hot spots
Down
- 1. Boundaries When two plates spread apart along a divergent boundary.
- 6. Lava flows are relatively slow moving, they are rarely deadly
- 7. During an explosive eruption, volcanoes can erupt large volumes of volcanic ash
- 9. Represents an area of earthquakes and volcanic activity that surrounds the pacific ocean
- 10. Magmas that form in different volcanic environments have unique chemical compositions
- 12. Are large, steep-sided volcanoes that result from explosive eruptions of andesitic and rhyolitic lava and ash