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Volcanoes--Vocabulary from EBOnline Article

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  1. magma
    molten rock in the earth's crust
    Volcanic Eruptions
    Art:In an eruption of a volcano, magma (liquid rock) may flow from vents as a liquid called lava.
  2. volcanology
    the branch of geology that studies volcanoes
    Studying Volcanoes

    Volcanology is the branch of geology that focuses on volcanoes.
  3. caldera
    a large crater caused by the violent explosion of a volcano
    Video:Crater Lake is located within a huge volcanic caldera in the Cascade Range of southwestern Oregon.
  4. earth tremor
    a small earthquake
    Many volcanologists work in observatories, from which they keep track of earth tremors and other signs of volcanic activity.
  5. volcano
    a fissure in the earth's crust through which gases erupt
    A volcano is an opening in Earth's crust.
  6. Mid-Atlantic Ridge
    a very long narrow elevation on the ocean floor that runs all the way from Iceland in the North Atlantic to Bouvet Island in the South Atlantic
    This type of volcano is common along the Mid-Atlantic Ridge, a mountain chain under the Atlantic Ocean.
  7. hot spring
    a natural spring of water at a temperature of 70 F or above
    Hot Springs, Geysers, and Fumaroles

    Hot springs, geysers, and fumaroles are other types of volcanic activity.
  8. erupt
    start suddenly
    When a volcano erupts, hot gases and melted rock from deep within Earth find their way up to the surface.
  9. eruption
    the sudden occurrence of a violent discharge
    Volcanic eruptions may be very destructive.
  10. volcanic
    relating to eruptions of gas and lava from the earth's crust
    Volcanic eruptions may be very destructive.
  11. Crater
    a faint constellation in the southern hemisphere near Hydra and Corvus
    Video:Crater Lake is located within a huge volcanic caldera in the Cascade Range of southwestern Oregon.
  12. hot spot
    a place of political unrest and potential violence
    They form at “hot spots” in Earth's crust.
  13. geyser
    a spring that discharges hot water and steam
    Hot Springs, Geysers, and Fumaroles

    Hot springs, geysers, and fumaroles are other types of volcanic activity.
  14. lava
    rock that in its molten form issues from volcanos
    Volcanic Eruptions
    Art:In an eruption of a volcano, magma (liquid rock) may flow from vents as a liquid called lava.
  15. fissure
    a long narrow depression in a surface
    This material may flow slowly out of a fissure, or crack, in the ground, or it may explode suddenly into the air.
  16. geothermal
    of or relating to the heat in the interior of the earth
    This energy, called geothermal energy, is difficult for people to control.
  17. crater
    a bowl-shaped geological formation at the top of a volcano
    A crater, or bowl-shaped pit, usually lies at the top.
  18. meter
    a basic unit of length (approximately 1.094 yards)
    The birth of a volcano was witnessed between 1943 and 1952, when a smoking hole in a Mexican farmer's cornfield erupted into a new mountain called Paricutín that eventually stood 1,400 feet (425 meters) above the level ground around it.
  19. cascade
    a small waterfall or series of small waterfalls
    Video:Crater Lake is located within a huge volcanic caldera in the Cascade Range of southwestern Oregon.
  20. molten
    reduced to liquid form by heating
    Molten rock rises between the plates as they move apart.
  21. sea level
    level of the ocean's surface
    Within a few years it built up to an area of 1 square mile (2.5 square kilometers), with a peak more than 560 feet (170 meters) above sea level.
  22. tsunami
    a cataclysm resulting from a destructive sea wave
    In 1883 the volcano Krakatoa exploded and collapsed, triggering a colossal sea wave known as a tsunami.
  23. liquid
    fluid matter having no fixed shape but a fixed volume
    Volcanic Eruptions
    Art:In an eruption of a volcano, magma (liquid rock) may flow from vents as a liquid called lava.
  24. debris
    the remains of something that has been destroyed
    Sometimes these gases are mixed with ash and other hot debris.
  25. composite
    consisting of separate interconnected parts
    Stratovolcanoes, also called composite volcanoes, are mountains shaped like cones.
  26. tremor
    an involuntary vibration, as if from illness or fear
    Many volcanologists work in observatories, from which they keep track of earth tremors and other signs of volcanic activity.
  27. observatory
    a building equipped to view astronomical phenomena
    Many volcanologists work in observatories, from which they keep track of earth tremors and other signs of volcanic activity.
  28. geology
    science of the history of the earth as recorded in rocks
    Studying Volcanoes

    Volcanology is the branch of geology that focuses on volcanoes.
  29. temperature
    the degree of hotness or coldness of a body or environment
    Fresh lava ranges from 1,300° to 2,200° F (700° to 1,200° C) in temperature.
  30. metal
    a chemical element or alloy that is usually a shiny solid
    People also use the volcanic stone called pumice for cleaning wood, metal, and other surfaces and in producing building materials.
  31. electric
    using or providing the flow of charge through a conductor
    However, hot water and steam trapped below the surface have been used to heat homes and greenhouses and to produce electric power in several countries, including Italy, New Zealand, Japan, Iceland, and the United States.
Created on Thu Oct 20 16:05:21 EDT 2011

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