What causes volcanic erruptions?

Answer 1

The volcanic chamber underneath the volcano produces the hot lava and when is too hot, the chamber sends an outburst of lots of lava and volcanic bombs (which are hot, hard, lava). If the volcano is strong enough, the lava comes out of the top of the volcano and runs down the sides. The lava cools down as it goes down and so the lava that is left to cool on the volcano, forms another layer to the volcano and increases the size it the volcano. This is how volcanoes errupt and then increase in size.

Hope this helps :)

Answer 2

Volcanoes erupt because the pressure on the magma beneath becomes too great for the layer of rock above to contain. The layer of rock gives and the magma bursts through to relieve all the pressure, and launches from the volcano.

Answer 3

the volcanoe is either distinct or active. The magma at the bottom rises to the top and then it just blows up and makes a pyroclastic cloud which is so powerful it goes through the whole area destroying nearly everything. The volcanoe produces lava bombs and they fall from the top and if one hits u ur ded. SO ITS THE MAGMA WHAT RISES FROM THE CORE IN THE CENTRE OF EARTH AND THEN JUST WAITS FOR THE RIGHT MOMENT TO ERUPT. BEFORE IT ERUPTS U CAN SMELL SULPHUR DIOXIDE.