Quizlet Science Test on Volcanoes

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  1. Aa: A brittle stiff lava.
  2. active volcano: A volcano that shows signs of erupting.
  3. blocky lava: a cool stiff lava that can't move very far from the vent.
  4. caldera: Forms when a magma chamber empties, and the ground above it falls in, creating a large, sinking depression.
  5. cinder cone volcano: CHARACTERISTICS: A small, explosive volcano that is made entirely from pyroclastic material.
  6. cinder cone volcano: A volcanic cone created entirely from pyroclastic material. They are small and explosive.
  7. composite volcano: CHARACTERISTICS: A combination completely of the other 2 types of volcanoes, forms by both repeated layers of runny lava and by pyroclastic material, its' size can vary, and can be both explosive and non-explosive.
  8. composite volcanoes: They are built out of pyroclastic material and layers of runny non-explosive lava. Are sometimes explosive, and sometimes aren't.
  9. convergent boundary: GOOD TO KNOW: This boundary usually forms explosive volcanoes.
  10. crater: A funnel shaped pit and the main vent or a volcano.
  11. divergent boundary: GOOD TO KNOW: This boundary almost always forms a non-explosive volcano.
  12. dormant volcano: A volcano that doesn't show signs of erupting but has erupted in recorded history.
  13. extinct volcano: A volcano that hasn't erupted in recorded history and most likely will never erupt again.
  14. false: TRUE OR FALSE: A rift and a fissure are the same thing.
  15. false: TRUE OR FALSE: A caldera is smaller than a crater.
  16. false: TRUE OR FALSE: A caldera and a crater are formed similarly.
  17. false: TRUE OR FALSE: The less water, the larger the explosion.
  18. false: TRUE OR FALSE: A stratovolcano is another name for shield volcano.
  19. false: TRUE OR FALSE: Cinder cone volcanoes are most often the biggest type of volcano.
  20. fissures: Large cracks in the earth's crust.
  21. hot spots: When tecontic plates meet directly below a mantle plume, it forms these.
  22. lapilli: Pebble sized bits of pyroclastic material that vary between 2 and 64mm in diameter.
  23. lava: magma that has been exposed to oxygen.
  24. lava flows: Rivers of red hot lava.
  25. lava plateaus: They form similarly to sheild volcanoes; built out of layers of runny, non-explosive lava. They aren't volcanoes.
  26. magma: Hot liquid that is created deep underground beneath the earth's crust.
  27. mantle plumes: columns of rising magma.
  28. Mauna Kea: An example of a shield volcano.
  29. Mount Fuji: An example of a composite volcano.
  30. pahoehoe: A type of lava that is slow-moving, and is like wax. It resembles rope.
  31. Paricutin: An example of a cinder cone volcano.
  32. pillow lava: Lava that forms during underwater eruptions.
  33. pyroclastic material: Magma and pieces of rock that fly through the air in a wreck of destruction during a violent eplosive eruption.
  34. rift: A deep crack.
  35. seismograph: An instrument that measures earthquakes. If many earthquakes that are small occur in a reletively short amount of time around a volcano, it may mean that the volcano is going to erupt soon.
  36. shield volcano: CHARACTERISTICS: A gigantic, non explosive volcano made from repeated layers of non-explosive lava.
  37. shield volcanoes: Built out of layers on runny, non-explosive lava. They are large and non-explosive.
  38. silica: This mineral block causes eruptions to be more violent the more it has of it.
  39. stratovolcano: Another name for composite volcano.
  40. tiltmeter: An intrument that measures the difference of the sope of a volcano that can change, leading scientists to believe whether or not it will erupt. It isn't 100% accurate.
  41. true: TRUE OR FALSE: A caldera is much larger than a crater.
  42. true: TRUE OR FALSE: Aa is a stiff, brittle lava.
  43. true: TRUE OR FALSE: The more silica, the larger the eruption.
  44. true: TRUE OR FALSE: A stratovolcano is another name for a composite volcano.
  45. true: TRUE OR FALSE: A stratovolcano is not a cinder cone volcano.
  46. vents: Holes where magma comes to the earth's surface.
  47. volcanic ash: Forms when stiff magma quickly expands. Is less than 2mm in diameter.
  48. volcanic blocks: Large pieces of pyroclastic material that is made up of rock.
  49. volcanic bombs: Blobs of magma that harden in the air.
  50. volcano: A build-up of pyroclastic material or magma on earth's surface.
  51. water: This thirst-quinching natural liquid causes eruptions to be more explosive.