EMS-Managing natural hazards, page no 146
What are volcanoes:
A volcano is a landform, a mountain, where molten rocks erupt through the surface of the planet. The volcano mountain opens downwards to a pool of molten rocks underneath the surface of the earth. Pressure builds up in the earth's crust and this is the reason why eruptions occur.
The characteristics of volcanoes. There are two types of volcanic activity:
Intrusive, when magma cools underground to form igneous rocks.
Extrusive, when magma flows out onto the Earth's surface as lava.
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How can scientists predict volcanic eruptions?
How do volcanic eruptions affect human populations?
What are some famous historical volcanic eruptions?
How do volcanoes contribute to the formation of new land?
What are the primary hazards associated with volcanic eruptions?