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