- 1. What percent of the earth is covered by the continents?
A) 3%
B) 21%
C) 12%
D) 29%
- 2. What is a fissure in the earth's surface called where magma can be expelled?
A) volcano
B) vent
C) magma
D) conduit
- 3. What is a funnel shaped pit called near the top of a volcano?
A) lava flow
B) rift zone
C) fissure
D) crater
- 4. What is it called when a crater forms around a collapsed volcano vent?
A) parasitic vent
B) caldera
C) magma chamber
D) cinder zone
- 5. Yellowstone National Park is one of these.
A) hot spot
B) subduction zone
C) rift zone
D) magma chamber
- 6. A volcano made from pyroclastic material, with steep slopes, is called a _____.
A) composite volcano
B) cinder cone volcano
C) shield volcano
D) ring of fire
- 7. A volcano built by layers of lava, with gently sloping sides, is called a _____.
A) shield volcano
B) composite volcano
C) hot spot
D) cinder cone volcano
- 8. A volcano marked by explosive eruptions with a wide base and steep slopes, is called a _____.
A) shield volcano
B) composite volcano
C) caldera
D) cinder cone volcano
- 9. What two factors increase as you go deeper into the earth?
A) heat and water temperature
B) heat and pressure
C) magma and lava
D) pressure and magnetic polarity
- 10. What is a passage through which magma flows in a volcano called?
A) hallway
B) drain vent
C) dike
D) conduit
- 11. What sort of cloud can form in the air after some volcanic eruptions called?
A) ash cloud
B) thunderstorm
C) volcanic bomb cloud
D) lava cloud
- 12. Before lava reaches the surface, the molten material is called _____.
A) volcanic ash
B) rock
C) magma
D) basalt
- 13. Volcanoes belts form along _____.
A) earth's plate boundaries
B) areas of elliptical fault lines
C) islands
D) all mountain ranges
- 14. The formation of the Hawaiian Islands is an example of a _____.
A) Ring of Fire
B) hot spots
C) diverging plate boundaries
D) continental drift
- 15. The volcano that may erupt again at some time in the future is called _____.
A) extinct
B) dormant
C) explosive
D) active
- 16. What causes small earthquakes that occur around a volcano before it erupts?
A) plate tectonics
B) upward movement of magma
C) volcanic bombs
D) steam from boiling water
- 17. Magma that squeezes into cracks between rock layers and then hardens is called a _____.
A) caldera
B) sill
C) batholith
D) vent
- 18. A very large, intrusive, rock formation is called a _____.
A) sill
B) dike
C) mountain
D) batholith
- 19. Rocks that form when magma cools underground are called _____.
A) sedimentary
B) mudstone
C) extrusive
D) intrusive
- 20. Volcano only refers to the erupting magma and the lava flows it creates.
A) true
B) false
- 21. The smallest and most common type of volcano is the _____.
A) cinder cone
B) composite
C) stratovolcano
D) shield
- 22. A stratovolcano and a composite volcano are the same type of volcano.
A) false
B) true
- 23. A ground hugging avalanche of hot ash, pumice, rock fragments, and volcanic gas that rushes down the side of a volcano is called a _____.
A) pyroclastic flow
B) lava flood
C) ash cloud
D) parasitic event
- 24. A lahar is the same thing as a volcanic mud flow.
A) false
B) true
- 25. Pyroclastic fall refers to all but one of the following rocks. Which one does not belong on this list?
A) gneiss
B) tuff
C) bombs
D) ash
- 26. The most common gas released by magma is called _____.
A) carbon dioxide
B) hydrochloric acid
C) water
D) sulfur dioxide
- 27. One thing that geologists monitor to predict volcanic eruptions is earthquakes.
A) false
B) true
- 28. One thing that geologists monitor to predict volcanic eruptions is the transpiration of water.
A) false
B) true
- 29. One of the following is NOT a volcanic rock. Which one does not belong on this list?
A) laccolith
B) pumice
C) scoria
D) obsidian
- 30. Old Faithful In Yellowstone National Park is an example of a _____.
A) mineral spray
B) extrusion
C) hot spring
D) geyser
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