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Study Guide Answers

1.     From where does the heat that powers the hydrothermal activities come?
     magma or molten rock
2.     Where are hydrothermal features usually found?
      in regions of recent volcanic activity
3.     Where is the world's largest concentration of hydrothermal activity?
     Yellowstone National Park
4.     Why is #3 so concentrated in hydrothermal activity?
     magma lies less than a mile underground
5.     The world's most common hydrothermal features are ___________________ .
     hot springs
6.     What is an upwelling of groundwater with a temperature that's warmer than that  of the human body?
     hot springs
7.     What is a specialized type of intermittent hot spring?
     geyser
8.     What are vents in the earth's surface that emit only steam?
     fumaroles
9.     What is spewed from a geyser?
     hot water and steam
10.     Name the famous geyser at Yellowstone National Park.
     Old Faithful
11.     Where a spring and geyser emerge on a flat land surface,  a(n) ___________________  or a(n) ____________________ may form.
     cone; dome
12.     What is a calcite deposit that forms when the water in a hot spring contains high amounts of easily dissolved limestone?
     travertine
13.     Of what is sinter mainly composed?
     silica
14.     What is a porous deposit of calcium carbonate?
     tufa
15.     Discuss some uses of hydrothermal activity.
     Discussion
© Educational Video Network, Inc. 2005 - www.evndirect.com
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