The volcano is a powerful force in nature.
First, heat from
beneath the earth’s surface melts solid rock into a white hot mixture of gas
and a liquid called magma. The
gas-filled magma is lighter than the unmelted rock. This causes the magma to rise toward the
surface, melting gaps in the rock as it rises. Then the magma enters the magma chamber. Since
a region of magma would be hardened after a past eruption, the magma continues
to push and melt its way upward. It pushes through channels of weak, fractured
rock consisting of hardened magma. Eventually, the magma and gas push up to the
top of the volcano and blast up through an opening called the central vent.
Volcano eruptions can be shocking and dangerous events which may cost lives or cause damage to buildings.
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