New Activity
Play Fill in the Blanks Game
Volcanoes blast more than 100 million tons of carbon dioxide into the atmosphere every year but the gas is usually ____________________ . When a volcano erupts , carbon dioxide spreads ____________________ into the atmosphere and isn't ____________________ in one spot . But sometimes the gas gets trapped ____________________ under enormous pressure . If it escapes to the surface in a dense ____________________ , it can push out oxygen - rich air and become deadly .
Huge clouds of carbon dioxide ____________________ released from California's volcanic Mammoth Mountain in 1984 , ____________________ thousands of trees . The U . S . Forest Service declared the area ____________________ - limits to campers and keeps a close eye on gas levels there to ____________________ day .