Volcanos can be of different types. Based on their activeness, they are classified as active, dormant or extinct. The active one may erupt anytime sooner or later. A dormant volcano has been known to erupt, however, have not emitted lava and gases for quite some time and extinct or wiped out volcanoes are probably not going to erupt anymore.
The fumingly hot molten or semi-fluid rock that flows down, the earth is known as "lava". The lava that comes out of a volcano has great value. It contains deposits of aluminium, diamonds, gold, nickel, lead, zinc, and copper.
Volcanoes can create various kinds of lava or magma.
1. Pahoehoe Lava- Smooth gelatinous and wrinkly
2. Aa lava - Thicker and rough-textured
3.Pillow Lava - Pillow Shaped
10 Volcano facts
1. Molten rock is called lava or magma.
2. As long as the molten rock remains beneath the Earth's surface is called magma
3. As soon as magma comes out of the earth's surface and flow it becomes lava.
4. An opening in Earth's surface through which volcanic materials such as gaseous cloud, lava ash, etc come out is known as "Vent"
5. An area around the volcanic vent is called Crater.
6. Over time, as the volcano continues to eject lava and other volcanic materials, its size gets bigger and bigger.
7. The ejection of Mount St. Helens in 1980 made the biggest avalanche in written history.
8. As per the National Museum of Natural History's Global Volcanism Program, there are more than 1,500 volcanoes on the planet.
9. The majority of the Earth's volcanoes are situated around the Pacific Ring of Fire.
10. Countries like the United States, Russia, Indonesia, Iceland, Japan & Chile have the maximum number of volcanoes.
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