#RFB-11000162Reading: Fill in the BlanksAcademic,CoreHardReal Exam Prediction
Volcanoes
Official Question Material
Prep: Varies
Volcanoes blast more than 100 million tons of carbon dioxide into the atmosphere every year but the gas is usually [blank] . When a volcano erupts, carbon dioxide spreads out into the atmosphere and isn't [blank] in one spot. But sometimes the gas gets trapped [blank] under enormous pressure. If it escapes to the surface in a dense [blank] , it can push out oxygen-rich air and become deadly.
Sample Answer & Audio Transcript
Volcanoes blast more than 100 million tons of carbon dioxide into the atmosphere every year but the gas is usually harmless . When a volcano erupts, carbon dioxide spreads out into the atmosphere and isn't concentrated in one spot. But sometimes the gas gets trapped underground under enormous pressure. If it escapes to the surface in a dense cloud , it can push out oxygen-rich air and become deadly.
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