Page 1 - Microsoft Word - 12.2 VOLCANIC ERUPTION

CHAPTER-12 NATURAL DISASTER
TOPIC: VOLCANIC ERUPTION

VOLCANOES

ACTIVE DORMANT EXTINCT

What are Volcanoes?

 A volcano is a landform, a mountain, where molten rocks erupt through the surface of
the planet.
 Volcanoes are ruptures in the crust of our planet Earth that allow hot gases, molten lava
and some rock fragments to erupt by opening and exposing the magma inside
 The volcano mountain opens downwards to a pool of molten rocks underneath the
surface of the earth.

How Do Volcanoes Erupt?

 It is so hot deep within the earth that some rocks slowly melt and turn into a thick
flowing matter known as magma.
 Since it is lighter than the solid rock around it, the magma rises and gets collected in
magma chambers.