Preview

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

Good Essays
Open Document
Open Document
329 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Volcanoes, What is a Volcano,The types of volcanoes,How are Volcanoes formed,How is magma turned to lava.
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 vent at the top of the volcano gases also come out from within the earth. The gas comes out with the huge amounts of dust and ash that rise into the sky that can be seen from kilometres

You May Also Find These Documents Helpful

  • Good Essays

    The type of magma affects the severity and type of volcanic processes that occur because where there is basic (basaltic) magma, that is low is silica thus has a low viscosity, trapped gas bubbles are allowed to expand freely as they rise to the surface. This means the eruption fluid is free-flowing and therefore cannot suddenly erupt explosively. On the other hand, where there is acid (andesitic and rhyolitic) magma, the silica content is high therefore it has a high viscosity meaning gas bubbles struggle to expand and the magma often solidifies before it reaches the surface. These solidified sills and dykes cause a blockage that leads to a build up of pressure and eventually to a violent explosion.…

    • 1598 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    |when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. |…

    • 1153 Words
    • 5 Pages
    Powerful Essays
  • Satisfactory Essays

    Geology Chapter 5

    • 580 Words
    • 3 Pages

    An effusive eruption occurs when the magma feeding the volcano is hot and mafic causing it to have low viscosity. An explosive eruption occurs when pressure builds in a volcano. It may be a small explosion like a basaltic eruption where the gas builds up and suddenly escapes or it can be a large explosion which can be triggered by many things, such as cracks in the flank of an island volcano where water enters the magma chamber and turns to steam, or if a very viscous magma plugs the vent and the pressure increases so much it cracks parts of the volcano and…

    • 580 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Cinder cone volcanoes are just one of many types of volcanoes. A cinder cone, or scoria cone, is a steep conical hill made in large part of pyroclastic fragments. They are the simplest type of volcano and tend to be small and hill like. They are built…

    • 963 Words
    • 4 Pages
    Good Essays
  • Good Essays

    A volcano is a mountain with a vent at the top where magma and gasses…

    • 631 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Pompeii Research Paper

    • 1091 Words
    • 5 Pages

    Volcanoes are formed on land near coastal areas when a continental plate and an oceanic plate converge. The oceanic plate submerges, due to its higher density, and is pushed deeper and deeper beneath the surface. The high temperature and pressures below melt the rock which creates hot, buoyant magma. Ultimately this magma rises towards the surface and accumulates in a reservoir, known as the magma chamber. The eruption occurs when the pressure within in the chamber surpasses the pressure of the upper rock, magma forces its way through the cracks in Earth’s crust. Magma that is low in gas and silicon dioxide produces thin quickly spreading lava which has a low viscosity, while a magma that is heavily composed of gas and silicon dioxide will yield a thick, viscose magma. The thicker magma builds up and because of this pressure, will cause a large…

    • 1091 Words
    • 5 Pages
    Better Essays
  • Good Essays

    Wizard Island

    • 751 Words
    • 4 Pages

    Other kinds of Volcanos include a shield volcano that is typically large and has slow flowing liquid lava and a composite volcano. Composit volcanoes are steep and large and have layers from past eruptions that are made of lava.…

    • 751 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    When volcanos form they form just like a regular mountains actually they are they are just regular mountains.That is why when they erupt it shocks many people because they all thought the possibility was rare.When the tectonic plates shift they cause a dramatic change in the mountain it causes molten rock to shoots up from the top of the mountain the molten rock just builds up and up until the top of the mountain erupts!It shoots out chunks of…

    • 469 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Jfk Research Paper

    • 423 Words
    • 2 Pages

    Scientist Ben Kennedy begun a very lengthy quest to solve the mystery of the shrinking pumice. This quest would eventually change the way scientists think about volcanoes-forever. One of the things (out of many) that he and his colleagues found out while on the road was that not only the rock was shrinking, the pores that make up the rock were shrinking as well. They think that this was due to the heating of the rock, and the molten rock's surface tension. What the scientist found was how some volcanoes function on the inside. In past years, volcanologists believed that flowing lava sinks back down and settles after an eruption, pressing on the magma below and crushing all of the bubbles, which makes pressure build up under the compacted lava. This leaves the lava sitting there...Until it explodes. Pow! This hints at why some volcanoes will go through cycles of flowing and explosive eruptions.…

    • 423 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Volcanic Assignment

    • 605 Words
    • 3 Pages

    •It involves the explosive ejection of relatively viscous lava, it can send ash and volcanic gas tens of miles into the air. The resulting ash fallout can affect large areas hundreds of miles downwind. Fast-moving deadly pyroclastic flows…

    • 605 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Volcanoes exist all around the world. There are three types of volcanoes, they are shield volcano, cinder cone volcano and a composite volcano. A volcano is a place where ash, gases, and molten material rock from deep underground erupt to the surface. Lava comes out of a vent , then it turns into a lava flow. When external waters, such as groundwater , mixes with magma and then it turns into steam. The violence of an eruption depends on the amount of gas that was dissolved in the magma. Pyroclastics, form from when fragments of magma are thrown into the air by expanding gas. silicic caldera complexes produce the most violent volcanic eruptions.…

    • 467 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Volcanoes In Pompeii

    • 1210 Words
    • 5 Pages

    First of all, there are very many causes of volcanoes. Volcanoes are mountains that have hot scorching magma and lava boiling inside of it (Magloff, 2013). To begin, volcanoes have large channels that transport magma and lava from the crust of the earth to its surface. Underneath the volcano in a large open space, is the magma chamber. The magma chamber houses all of the searing magma and lava. When there is…

    • 1210 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Volcanoes generally erode away, they are not often preserved in the geologic record, but we can infer what types of volcanoes were present by the volcanic deposits left behind. The large, violent volcanoes, called stratovolcanoes, often produce…

    • 319 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Mount Kilauea

    • 393 Words
    • 2 Pages

    While in class, we have learned many things about the earth and its elements that are within it. One thing about the earth that we have learned about is volcanoes. The text describes a volcano as a hill or a mountain that is constructed by the extrusion of lava or rock fragments from a vent (Plummer, 2007).…

    • 393 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Mount St Helens Essay

    • 756 Words
    • 4 Pages

    Being so close to an active volcano poses many risks to communities. Even though Mount St. Helens erupted over 30 years ago we know that it is still an active volcano. Future eruptions can kill and injure entire communities. Since the eruption in May of 1980 of Mount St. Helens, geologists have come to a better understanding of both the mechanics of volcanoes and the dangers they present to the environment and communities. Did you know that volcanic ash is actually small glass particles?…

    • 756 Words
    • 4 Pages
    Good Essays

Related Topics