5 interesting facts about volcanoes.
1. After 143 years of peace, Mt. St. Helens erupted.
2. When magma emerges from the earth it becomes known as lava.
3. Volcanoe craters are often filled with rain water.
4. About 250 underwater volcanoes erupt every year.
5. Sulfa is deadly, but we mine and use it for rubber to make it more durable.
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