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Vulcanicity is a process through which gaseous, liquid and solid materials are forced out of the earths crust to the earths surface.

Volcanicity is the process where igneous materials reaches the earths surface from the earths crust to the earth surface

Magma reaches the earth surface during an eruption. Once the magma is on the surface it is called lava.

The god of fire, who presided over the working of metals; -- answering to the Greek Hephaestus.

Since the plates pull apart from each other, a volcano is formed. Magma will push its way up through the cracks found between the plates onto the Earth's surface. The magma reaches the Earth's surface as lava. Lava and magma are made of the same substance. The process by which magma and other materials reach the Earth's surface is called vulcanicity. The outpouring of the lava to the surrounding areas is called an eruption. This is caused by the build-up pressure caused by gases below the Earth's surface. The magma may flow out onto the Earth's surface quietly or be accompanied by violent eruptions. The lava hardens on the Earth's surface as the temperature is cooler. The hardened lava built up from many eruptions results in a cone-shaped mountain called a volcano.

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