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