Volcanoes

1. Basaltic lavas that are much more fluid
5. Fluid basaltic lava extruded from crustal fractures
7. Dust and has can significantly alter global temperatures
11. Magma that is forcibly injected into a fracture zone or bedding zone
13. Mud flow from interaction with debris and water
14. lava with a rough, jagged, blocky texture
16. 1980, the largest historic eruption in North America
20. Fiery pyroclastic flow made of hot gases infused with ash and other debris
21. Steep walled depression at the summit and generally less than 1 kilometer in diameter
24. Fire fragments such as ash and dust, pumice, Lapilli etc

2. Poisonous gases can be inhaled
3. Clouds of volcanic ash damage planes
4. Lavas occurring along divergent plate boundaries on the ocean floor
6. Activity within a tectonic plate
8. A summit depression typically greater than 1 kilometer in diameter which is produced by collapse following a massive eruption
9. A source material for volcanic eruptions
10. One to six percent of magma by weight
12. lava that resembles a twisted or ropey texture
15. Opening connected to the magma chamber via a pipe.
16. Large amounts of intruded material
17. Triggered from collapse of volcanic landforms in the ocean
18. the resistance to flow
19. Resistant vents left standing after erosion has removed the volcanic cone
22. Built from ejected basaltic lava fragments forming a steep slope
23. Magma rises through crust