Volcanoes

At least 1,500 active outletes dot the globe, and some of them cast down been regularly flip ones wiging for years. They variant when molten rock called magma, breaks with a weak argona of mankinds surface. The chamber that tone down magma piece of ass quietly flow resistivity for hundreds of years, and then erupt with great fury. I will be explaining more of the grandness of vent-holees, and some of the different chacteristics they have. Volcanoes are holes or vents in the dry lands crust, created when molten, hot magma, under(a) the crust of the Earth is stick upward to the surface. First, magma collects in a pocket beneath the crust, draw builds up and forces it up finished cracks to the surface, and hot mess upes try to bilk but are trap in the magma. Next, the surface of the Earth begins to bulge until the mechanical press can no longer be contained. Finally, heavy weaponses and fragments are released in a violent explosion called a volcan ic eruption. A volcano can erupt many another(prenominal) times in its lifetime. The material released over many eruptions piecemeal builds up a cone shaped mountain. First, in the spunk of the mountain is a vent called the primal vent; at that place can be smaller side vents that come attain of the central vent.

Next, in that location is a bowl shaped volcanic crater at the top of the central vent and under the volcano there is a large magma chamber where the magma is. The explosive force of a volcano depends on how much gas is concur in the magma. When there is a lot of gas detain in the magma the eruptions are more explosive,! and when there is less gas the eruptions are less explosive. Magma flows out of the volcano in the bod of lava. The lava exiting from an erupting volcano settles on the sides of the volcanic mountain and cools forming a unuttered crust. If there were more pressure the magma would be shot into the air, and if there were less pressure it would just flow out of the top. Depending on how much lava and magma build up different types of volcanoes can be formed....If you want to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper