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Volcanoes Text and Actions The Earth's crust, its hard top layer, is made of several pieces, called tectonic plates. The plates float on top of the mantle. They are always moving, because of convection currents. Where the plates collide or rub together they cause earthquakes and fold the crust into mountains. Where they move apart or slip under one another, melted rock or magma forms. The mantle rises to the surface to form volcanoes. Movements to go with listening to the text about Tectonic Plates. * crust laced fingers * tectonic plates hands move over and under each other * float wobbly hands * convection currents move hands clockwise and anti-clockwise * move apart move hands apart * goes under one hand stretched flat goes under the other also stretched out flat * molten rock rises laced fingers to wiggly fingers rising * collide bring hands together in a clap * rub together rub hands together * earthquakes hands and forearms locked and shaking * fold the crust into knuckles together, then roll the mountain fingers upwards into a mountain * a volcano erupts hands up and outwards
