Geysers Periodically Boil and Erupt Because

question 21

Multiple Choice

Geysers periodically boil and erupt because .

• A) new groundwater flows in to replace that lost in the prior eruption, this takes time
• B) each injection of hot magma at depth triggers another episode of boiling in groundwater
• C) the god Vulcan is at work at his subterranean forge
• D) great pressures from deep water- filled chambers prevent water from boiling until higher temperatures are reached; eventually enough heat is supplied by the hot (volcanic) rocks to expand the water and let it boil anyway

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