These currents move the plates a few centimetres every year. This process is called the convection currents. Radioactive elements fall into pieces in the earth core and by that semifluid material rises through heat until it reaches the mantle of the earth where it cools down and sinks back down to the earth core. Underneath there is semifluid material on which the earth plates float like a boat. The reason for the moving earth plates is because only the outmost layer of the earth is solid. At these areas where the earth plates drift apart (convergent plate boundary), collide (convergent boundary) or drift past each other (conservative plate boundary) arise volcanoes. This process of the moving plates is called plate tectonics. These plates are not fixed anchored but are moving every year a few centimetres. His theory said that the earth crust is not one complete piece, but consist of several continental plates. In the year 1912 a German scientist named Alfred Wegener developed a theory that later became true. Long time ago no one knew why volcanoes originated only in certain places and at others not at all. On this island happen a lot of volcano eruption so the population living there gave the island the name volcano, because of the fire god “Vulcanus”. The name “Volcano” comes from the island Sicily in Italy. These arise over time through many volcano eruptions where lava exits the volcano and cools down. Mostly in the form of a high mountains / hills.

A volcano is an opening on the surface of the earth.

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