Words to know about volcanoes
Crust = Thin semi-rigid outer surface of planet earth.
Mantle = Semi-molten region of rock beneath the crust.
Convection Current = Movement in liquid or gas due to heating.
Core = Solid centre of the earth.
Tectonic plates = Defined area of crust that moves as a whole.
Erosion Cycle = Break-up, transport and deposition of rock material.
Weathering = The breakdown of rock due to physical and chemical reactions.
Meteorite = Rock from space that hits the planets surface.
Glacier = River of solid water, as the huge mass slowly moves forward under the force of gravity.
Lava = Liquid rock (magma) that flows from volcano.
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