Volcanoes: An Essay: What Are Volcanoes?

Volcanoes obtain their energies from such movement and pressure. Volcanoes form at the boundaries of these plate where two types of movement occurs, two plates will collide with each other or the plates will move apart from each other. Some of these plates layers are cooled and are made up of rigid rocks. The affects on the landscape is lava that releases onto the Earth's surface. When that lava comes to the Earths surface, it is red hot and sometimes the temperature is more than 2012 degrees Fahrenheit.

The molten rock that erupts from the volcano forms a hill or mountain around the vent. The lava may flow out as a viscous liquid or it may explode from the vent as solid or liquid particles. Kinds of Volcanic Materials Three basic materials that may erupt from a volcano are; 1. lava, 2. rock fragments, and 3. gas. Lava Lava is the name for magma that has been released onto the Earth's surface. When lava comes to the Earth's surface, it is red hot and may have temperatures of more than 2012 degrees Fahrenheit.

In a short version: the earth’s plates shift and move. After the plates collide into each other, one plate is pushed down into the mantel below the crust and melts. Hot magma from the mantle breaks through a weak spot in the crust. As the Ziehm 2 magma shoots out of the crust, the cooling magma called lava becomes hard. After significant time, the hard lava forms a volcanic mountain.

One type of volcanic eruption is when magma rises through the surface and comes out of a vent as a lava flow this is called an effusive eruption. Magma is torn to bits called pyroclasts as it makes it’s way to the surface this is an explosive eruption , according to volcano.oregonstate.edu . Volcanoes are destructive in their own way

The Range of Physical Phenomena that are Associated with Volcanic Hazards Volcanic eruptions bring with them a large range of hazards. This report will describe the different range of hazards associated with volcanic activity and discus possible ways that hazards can be avoided. A volcanic eruption can, force people to leave their homes, damage sources of water, destroy homes and farms, restrict travel and kill. Pyroclastic flow is a flow of volcanic rock, and the most devastating effect of an explosive eruption. A pyroclastic eruption is one in which the great majority of activity involves fountaining or explosions.

Natural Disaster Pamphlet - Volcanos What are Volcanoes? A volcano is a opening or rupture on the earth’s crust. The rupture leads to a pool of molten magma, near the core of the earth. When the earth’s crust ruptures, pressure builds up, resulting in an eruption occurring to release the pressure. Toxic gases and rocks shoot up through the opening, overflowing the air with hot lava fragments.

Calderas happen when a massive blast of lava empties a volcano's magma chamber and causes the volcano to collapse on itself. Mud spots happen when water is heated underground can release steam that forces its way to the

Volcanoes need to be on top of a hot spot to erupt. A hot spot is a place on the Earth’s crust that magma from the mantle has broken through the crust. The magma pushes up through the crust and keeps pushing until there is a hole in the top of the mountain and when pressure builds up, it erupts out the top in a volcanic eruption. Another way it is formed is when the magma breaks through the surface of the Earth and it keeps coming out and erupting until a mountain is formed. The volcano erupts over and over again if it stays active.

These extruded materials can affect the Earth’s structure and atmosphere. There are three types of volcanoes existent on the Earth. The most common type of volcano is a cinder cone. A cinder volcano is built from ejected lava fragments that take on the appearance of cinders as they begin to harden while in flight. (Tarbuck, 152) The structure of this volcano is determined by the shape and slope that the pyroclastic material forms as it hardens.

Volcanoes What a volcano is Volcanoes are mountains that open below the surface of the earth to a pool of molten rock. Eruptions occur when there is a build-up of pressure. When there is an opening, gases and rock shoot out of the volcano and can also spill over and/or fill the air with fragments of lava. Lateral bursts can be caused by the eruptions, as well as hot ash flows, avalanches, falling ash, lava flows floods and mudslides. Entire forests have been known to get knocked down by volcanoes erupting.