Volcanoes, What is a Volcano,The types of volcanoes,How are Volcanoes formed,How is magma turned to lava.

Essay by jamie_bJunior High, 9th gradeA, June 2004

download word file, 1 pages 5.0

Downloaded 52 times

THE Types of volcanoes

There are three types of volcanoes shield, cinder cones and composite volcanoes. Shield volcanoes are large volcanic

Forms with that are broad at the top and have low, sloping sides. This type of volcano is caused by slow, basaltic lava flows.

Cinder cones are cone shaped volcanoes some are no more than a few meters and others get as big as high as 610 meters sometime more. Most of the tallest volcanoes are composite volcanoes. These form from quiet eruptions of fluid lava followed by explosive eruptions of viscous lava.

How is Magma turned into Lava?

Extremely high temperature and pressure cause the rock to melt and become liquid rock or magma. When a large body of magma has formed, it rises through the denser rock layers toward Earth's surface. Magma that has reached the surface is called lava.

How are volcanoes formed?

Volcanoes are formed when magma seeps through cracks in the earth's crust, and slowly builds up into a cone.

If there is a high pressure build up, they will have violent eruptions, but if there is not very much pressure, they will simply let magma seep slowly out.

What is a volcano?

A volcano is a vent in the Earth from which molten rock (m

A volcano is a vent in the Earth from which molten rock (magma) and gas erupts. The molten rock that erupts from the volcano also called lava forms a hill or mountain around the vent. There are many types of eruptions that are all different. There are some eruptions are quiet, with lava slowly oozing from a vent. Other eruptions are very violent, with lava and other materials being hurled hundreds of miles into the air. But lava is not the only thing that comes out of the...