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vol·ca·no

volcano

pronunciation:: val keI no
features:: Word History, Word Explorer

part of speech:	noun
inflections:	volcanoes, volcanos
definition:	A volcano is a mountain made from hot, melted rock that has come up from deep inside the earth. The melted rock comes through an opening in the earth's surface with a lot of force. When this happens, we say that the volcano is erupting. Sometimes a volcano does not erupt for thousands of years, but then it becomes active again. Each time a volcano erupts, the hot liquid rock cools and makes the volcano bigger in size. When a volcano erupts, it sends out melted rock called lava. It also sends out lots of smoke, ash, and small rocks.Volcanoes can be dangerous, but nowadays scientists can tell when a volcano is becoming active. Many people live in places that have volcanoes. Japan is a country that has very many, but most of them are not active.
related words:	mountain

Word History

In Roman mythology, Volcanus was the blacksmith of the Roman gods. He forged thunderbolts from his fire.

Word Explorer

	include the study of volcanoes
	geography
	some actions of volcanos
	erupt, explode
	some descriptions of volcanos
	active
	some parts of volcanos
	ash, gas, lava, magma, rock

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