Volcanoes Facts

Topics: Volcano, Lava, Magma Pages: 6 (1247 words) Published: February 6, 2012
Volcanoes Facts|
Volcanoes facts and examples|

Document about Volcanoes in general and 4 specific examples of volcanoes in the world|

Table of Contents
1.Our Earth3
2.1What is a volcano?4
2.2Few definitions4
2.3How does a volcano erupts?5
2.4Effect of volcanoes on people and the environment5
2.5Different types of volcanoes5
3.Volcano Examples6
3.1Mount Rainier6
3.2Mount Kilimanjaro8
3.3Mount Eyjafjallajokull10

Table of Figures
Figure 1: Our Earth3
Figure 2 Features of Volcano4
Figure 3: Volcanic landslides at Mount Rainier6
Figure 4: Volcanic eruption at Mount Rainier7
Figure 5: Crater of Mount Rainier7
Figure 6: Mount Kilimanjaro8
Figure 7: Clouds over Mount Kilimanjaro9
Figure 8: Bird eye view of Mount Kilimanjaro Crater9
Figure 9 Eyjafjallajökull's largest outlet glacier covered in volcanic ash11
Figure 10: The eruption on 27 March 201011
Figure 11: Crater of Hualalai12
Figure 12: Bird eye view of Hualalai13
Figure 13: Hualalai Mount View13

1. Our Earth

Figure [ 1 ]: Our Earth

Our earth is a beautiful planet in the universe, our earth is full of very interesting wonders and some of those wonders are Volcanoes. Earth has 1510 active volcanoes on the earth's crust and currently there are 80 known volcanoes under the oceans. A volcano is formed by movement of the tectonic plates [there are around 90 tectonic plates] which move slowly under the earth's crust. When two of these plates slide on top of each other it goes higher and higher until it is on top of the earth's crust. This makes a volcano Earth is the only plant with the most volcanoes [Mars has 1 volcano 'Olympus Mons'.] This document is all about volcanoes 'What is a volcano' and other very interesting facts about 4 specific volcanoes. I hope you enjoy my document.

2. Volcanoes

This section provides information on volcanoes in general.
3.1 What is a volcano?

A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from below the surface. Please refer below picture for main features of a Volcano.

Figure [ 2 ] Features of Volcano
3.2 Few definitions

Crater – is the top of the volcano, where the ash and lava come out (also called the vent) Lava – is rock that in its molten form issues from volcanoes; when magma reaches the earth surface is called lava.

Magma Chamber -is a magma chamber is a large underground pool of molten rock found beneath the surface of the Earth. The molten rock in such a chamber is under great pressure, and given enough time, that pressure can gradually fracture the rock around it creating outlets for the magma. 3.3 How does a volcano erupts?

Volcano is on top of the earth’s crust and the underground part of the volcano is known as lava or magma chamber. The magma in the magma chamber goes up through the pipe, it also gathers rocks and ash with it, up the vent [top of volcano] and the volcano erupts. 3.4 Effect of volcanoes on people and the environment

Volcanoes sometimes are very dangerous and can destroy and harm many things like: * People and their houses
* Environment
* Plants and animals
* Dust causes pneumonia and illnesses
* Ash clouds can cause pollution as well as flights disruption (Because of the ash clouds aeroplanes cannot fly) 3.5 Different types of volcanoes

There are 3 different sorts of volcanoes in the world active, dormant and extinct. 1. Active- once it has erupted it has chances of erupting again. 2. Dormant- once it has erupted it has low chances of erupting again. 3. Extinct- has not erupted for 1000 years.

3. Volcano Examples

This section describes 4 specific volcanoes in the world.
4.6 Mount Rainier
Mount Rainier is the prominent volcano in Washington. Mount Rainier is the...
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