Volcanoes Crossword

5. a thick mostly flattened layer of cooled lava
8. volcanoes with a broad base and gently sloping sides
11. the resistance of a liquid material to flow
12. opening of a volcano
14. name used to describe numerous explosive volcanoes that form on the convergent plate boundaries surrounding the Pacific Ocean
16. a column of extremely hot mantle rock
17. expanded area inside a volcano formed from molten rock
20. volcanoes formed from alternating layers of hardened lava flows and pyroclastic material

1. any place where gas, ash, or melted rock come out of the ground
2. an eruption has not occurred in a long period of time
3. giant sections of lithosphere on Earth's surface
4. melted rock that has reached Earth's surface
6. hot ash and bits of rock
7. an opening or depression at the top of a volcano caused by eruptions
9. a long, underwater mountain range formed at divergent plate boundaries
10. volcanoes with steep sides, formed from a build up of ash and cinders around the vent
13. giant cracks in Earth's surface
15. large, basin-shaped depression formed by the collapse of the roof of a magma chamber
18. a location where a mantle plume rises through the asthenosphere to Earth's surface
19. melted rock below the surface of Earth