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vol·ca·no
 volcano
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- 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. A volcano begins with an opening in the earth's crust made by force from underground. Then, with an explosion, hot melted rock is thrown into the air through this opening, along with lots of smoke, ash, small rocks, and gases. Volcanoes build up over thousands of years with repeated explosions. Most of the time, nothing is happening inside a volcano. The mountain may have trees and plants growing all over it. It is like it is sleeping--maybe for thousands of years-- but sometimes a volcano becomes active. When a volcano becomes very active, it can explode and pour out the hot, liquid rock that eventually cools and adds to the size of the volcano.
The volcano sent out smoke for several days before it erupted and sent out rivers of hot, liquid rock.The melted rock that spills out of a volcano is called "lava."
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| related words: |
mountain |
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In Roman mythology, Volcanus was the blacksmith of the Roman gods. He forged thunderbolts from his fire.
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include the study of volcanoes |
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geography, geology |
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some actions of volcanos |
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erupt, explode, spout |
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some descriptions of volcanos |
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active, dormant, extinct |
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some parts of volcanos |
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ash, basalt, crater, gas, granite, lava, magma, rock |
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