The volcano in the world, we have both a powerful volcano (active volcanoes) is a mountain that still crackling volcanoes calm (dormant volcanoes) is. The mountain has a crackle in the past, the present, no crackle again and volcanoes extinguished (extint volcanoes) is a volcano that no crackling coming from the past
so the mountains could be the crackling is volcanic. Power itself when the crackling of the volcano. Magma in the crust layer, which consists of various elements together as liquid, known as magma. Some elements which are components of the magma when it is a gas and magma heat near the Earth's surface moves into gas, which is lighter than floating above the magma and tried to push himself through the crust out. A debris pieces. Along with being pushed up into the air with magma. After that, it will flow into the Earth. The pressure and flow of magma or the magma may occur as a flow that looks or moves slowly erupting severe dust and debris floating in the atmosphere, covering the world. The difference of the magma pushes out the nature of the bombs or move slowly on this flow. The scientists found that the composition of the magma is a key component of the volcano each aspect of the violence varied divided into the following cases: 1) If the magma is composed of iron and magnesium, a lot of it is less viscous. therefore flows out slowly, 2) if the magma contains silica. It is a very viscous So when it erupted, it erupted 3) gas with the magma is very mixed. The outbreak of this nature would be a serious blow. So when the volcano erupted through the earth's crust that was pushed out, it will be either solid, liquid and gas solid. Is found in the form of lava flows (lava flow) to flow, spread to a radius of several hundred kilometers. Ranging in size from as small dust or large, heavy multi-ton when the temperature drops, it becomes a rock called volcanic sediments (pyroclastic) Part flew into the air as it cools to call. Ashes pumice (volcanic ash) or liquid lava liquid crept through the crater to the atmosphere lava will look different in each explosion, such as elemental composition different cause eruptions of the volcano. Different as discussed above. The shape of the volcano is different, it is a direct result of the physical properties and characteristics of different volcanic gases as well. The volcanic eruption will contain water vapor, carbon dioxide, hydrogen sulfide, chlorine and so on.
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