Volcano Review Questions
1. What do you call a structure made of volcanic materials, the volcano itself?
2. Name two important benefits of volcanoes.
3. Name two more.
4. Name one type of geologic situation that leads to volcanoes.
5. Name another.
6. Name another.
7. What type of magma is associated with hot spot volcanoes?
8. What type of magma is associated with subduction zone volcanoes?
9. What type of magma is associated with rift zone volcanoes?
10. Why is magma associated with subduction zone volcanoes granitic?
11. What is the most common gas that comes from volcanic eruptions?
12. Why does magma associated with subduction zone volcanoes contain so much steam?
13. What term would be used to describe a volcano that is never expected to erupt again?
14. What term would be used to describe a volcano that has not erupted in a long time but may erupt
again?
15. What does the word dormant literally mean?
16. What term would be used to describe a volcano that is now erupting or could erupt at any time?
17. Any solid that comes out of a volcano would be called what?
18. When pyroclastics form a layer, that material would then be called what?
19. What do you call the smallest sized pyroclastic particles?
20. What effect can dust from a volcano in Indonesia have on us?
21. What do you call pyroclastic particles the size of sand grains?
22. What is the most damaging aspect of volcanic ash fallout?
23. What do you call pea to walnut sized pyroclastic particles?
24. What do you call truck sized pyroclastic particles?
25. What is one type of igneous rock that cinders are likely to be made of?
26. What’s another?
27. A fast moving, hot cloud of volcanic gases, rocks, and ash is called what?
28. What term describes how easily a liquid, like lava, flows?
29. Fast moving, low viscosity lava is called what?
30. Slow moving, high viscosity lava is called what?
31. Aa lava is also known as what, based on the sound it makes while moving?
32. What kind of lava often looks like coiled rope when cooled?
33. What aspect of volcanic eruptions kills most people?
34. Name one place where pyroclastic flows killed a lot of people.
35. Name another.
36. Other than water, name a common volcanic gas.
37. What do you call a blob of lava that hardens in flight?
38. What would you call an eruption where lava just pours out of a volcanic cone?
39. What would you call an eruption where lava appears to boil?
40. What would you call an eruption so powerful that the cone is destroyed?
41. Name an ex. of an explosive volcanic eruption.
42. Name another.
43. Name another.
44. Name the following features on a diagram of a generic volcano: flank, crater, caldera, vent, conduit
magma chamber
45. What kind of volcanic cone is characterized by having steep flanks of crumbly tephra?
46. What kind of volcanic cone is characterized by having gently sloping flanks?
47. What kind of volcanic cone is the smallest?
48. What kind of volcanic cone includes the world’s two tallest volcanoes?
49. What are the names of the two largest volcanoes?
50. Which one of them is taller?
51. What kind of volcanic cone is characterized by having layers of lava and layers of tephra?
52. Composite cones are also known as what?
53. What kind of volcanic cone is most likely to be made of basalt?
54. Name a cinder cone.
55. Name a composite cone.
56. Name another.
57. Name another.
58. What volcano is currently thought to be the most dangerous in the US?
59. Intrusive igneous formations are aka what?
60. Plutons are generally made of what kind of rock?
61. Which of the 3 major kinds of plate boundary are plutons associated with?
62. What is the largest kind of pluton?
63. Mt. St. Helen killed how many people in 1980?
64. Igneous intrusions that are formed when magma squeezes between layers of rock are called what?
65. Igneous intrusions that are formed when magma cuts across layers of rock are called what?
66. Igneous intrusions that are formed when magma inflates a sill into a mushroom shape are called what?
67. Name a country that gets a substantial amount of its energy from geothermal sources.
68. What is the world’s most active volcano?
1. volcanic cone
2. New land is formed, volcanic ash and rock weather to fertile soil.
3. Volcanic gases are the source of our atmosphere and oceans.
4. Plates diverging at a mid-ocean ridge.
5. A plate gets subducted, sediments melt, rising magma forms volcanoes on the overriding plate.
6. A rising plume of magma causes a string of hot spot volcanoes.
7. basaltic
8. granitic
9. basaltic
10. It is made from the melted granitic sediments dragged down on the basaltic plate.
11. water vapor
12. It comes from the melted wet sediments that have been under the sea for millions of years.
13. extinct
14. dormant
15. sleeping
16. active
17. pyroclastic
18. tephra
19. volcanic dust
20. It can block sunlight and lower temperatures.
21. volcanic ash
22. Ash can mix with water to form lahars.
23. cinders
24. blocks
25. pumice
26. scoria
27. pyroclastic flow
28. viscosity
29. pahoehoe
30. aa
31. clinker
32. pahoehoe
33. Depending on the size and situation, it could be tsunamis, pyroclastic flows, or it could be sun blocking
dust
34. Vesuvius, 79 AD
35. Krakatoa, 1883
36. carbon dioxide,sulfur dioxide, carbon monoxide, hydrogen sulfide, nitrogen
37. volcanic bomb
38. effusive
39. mixed
40. explosive
41. Mt St Helens, 1980
42. Mt Vesuvius, 79
43. Mt Pinatubo, 1991, Krakatoa, 1883, Tambora, 1815, Santorini, 1450 BC
44. See diagram in your notes
45. cinder cone
46. shield cone
47. cinder cone
48. shield cone
49. Mauna Loa, Mauna Kea
50. Mauna Kea
51. composite cone
52. stratovolcanoes
53. shield cone
54. Paracutin
55. Mt St Helens
56. Mt Fuji
57. Mt Rainier, Mt Vesuvius, Krakatoa, Mt Unzen, Mt Pinatubo, Mt Mazama, Mt Etna
58. Mt Rainier
59. plutons
60. granite
61. convergent
62. batholith
63. 57
64. sills
65. dikes
66. laccoliths
67. Iceland
68. Kilauea