"Chapter 6: Volcanoes": HTML5 Crossword

Across

4. This is the type of volcano that erupts on a regular basis. (12)
6. Mt. Pinatubo is located within this chain of islands. (11,7)
9. This is the type of volcano that hasn't erupted in recent history but could. (7)
10. This is the type of volcano that has not erupted in recorded history. (7)
11. Name the island off the coast of Iceland that is formed from an undersea volcano. (7)
13. This was the city in Italy that was destroyed by a large mud flow. (11)
16. This is the name of the instrument that detects movements of the Earth by volcanoes. (11)
18. Most volcanoes are found in this area. (3,4,2,4)
19. The Hawaiian Islands are an island arc that formed over this. (3,4)
20. Magma that reaches the surface is known as this. (4)

Down

1. What gas coming in larger amounts from a volcano due to erupt is detected by satellites? (6,7)
2. Slow, steady, and fluid lava flow is the sign of this type of volcano that has gentle slopes. (6,7)
3. In which direction is the Pacific Plate moving? (9)
5. What volcano destroyed the Italian towns of Pompeii and Herculaneum? (8)
7. What two factors cause volcanoes? (8,3,11)
8. Volcanoes occur at regions where one plate goes beneath the other known as this. (10,4)
12. Which type of volcano is most violent? (9)
14. This is the name for a larger crater depression at the top of volcanoes. (7)
15. Sulfur dioxide mixes with water to form this. (8,4)
17. The Great Rift Valley is found here. (6)