Volcanoes Essay

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.

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.

Rock Fragments Rock fragment are usually called tephra and are formed from sticky magma. This magma is so sticky that its gas can not easily escape when the magma approaches the surface or central vent. Finally, the trapped gas builds up so much pressure that it blasts the magma into fragments. Tephra consists of volcanic dust, volcanic ash, and volcanic bombs, (from smallest to largest size particle). Volcanic dust consists of particles less than one one-hundredth inch in diameter.

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.

What are volcanoes? A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur. In another definition it is a mountain That has a passage to the underground molten seas of rocks , when the pressure increases on this molten seas it causes eruption gases and molten rocks shoot up through a hole in the top of the mountain and fill the air with lava fragments . This eruptions cause a leatral blasts ,lava flows , hot ash flows and many other disaster .

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.

Hot gases, fragments of rock, soil are all thrown out due to the pressure. Lava and rock fragments spill over and the air fills with smoke. The lava, ash, and noxious gases are released at a high temperature in the range of 2,100°F (1,150°C). Avalanches, mudslides, hot ash flows, lava flows are all common disasters which follow a volcanic eruption. Volcano eruptions have in the past destroyed

One part of a volcano is the magma chamber. According to Universetoday.com it states that the magma chamber is where the molten rocks (magma) are stored. Lava is the hot magma that is outside of the volcano according to Universetoday.com. Universetoday.com said that the main vent is the weak point of the volcano where the lava is about to shout out. The ash cloud of the volcano is the smoke or rocks that shoots out, containing many dangerous gases like carbon dioxide, this smoke could be as dangerous as lava.

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

First the volcano will have an explosive eruption that ejects huge amounts of steam, gas, and ash. This is followed by the ejection of lava. Most composite cones are built of layers of fragment materials and flows of lava, all inclined outward away from the vent. Both Etna, in Sicily, and Vesuvius, near Naples are examples of composite cones. The most common type of volcanic cones are stratovolcanoes.