What Is A Volcano?. Volcanoes Are Great Examples Of The

1218 Words5 Pages
What is a volcano?
Volcanoes are great examples of the fiery power contained deep inside the Earth. These formations are essentially vents on the Earth 's surface where magma, debris, and gasses from the planet 's interior are expelled.
Where can you find volcanoes?
Volcanoes usually exist along the edges of tectonic plates (massive rock slabs that make up Earth 's surface). About 90% of all volcanoes exist within the Ring of Fire along the edge of the Pacific Ocean.
About 1,900 volcanoes on Earth are considered active, meaning they show some level of activeness and might erupt again. Many other volcanoes are dormant (sleeping), showing no current signs of exploding but likely to become active at some point in the future. Others are
…show more content…
When volcanoes erupt, they expel a mixture of gasses and particles into the air. Some of them, such as ash and sulfur dioxide, have a cooling effect because they or the substances they cause reflects sunlight away from the earth. Others, such as CO2, cause warming by adding to global warming.

What are the different parts of a volcano?
Magma Chamber
A magma chamber is a huge underground pool of molten rock sitting underneath the Earth’s crust. The molten rock in such a chamber is under extreme pressure, which in time can lead to the surrounding rock fracturing, creating outlets for the magma. This, as well as the fact that the magma is less dense than the surrounding mantle, allows it to seep up to the surface through the mantle’s cracks.
Magma
Magma is a mixture of molten rock found beneath the surface of the Earth. As well as molten rock, magma may also contain suspended crystals, dissolved gas and sometimes gas bubbles. Magma often collects in magma chambers that feed volcanos.
Magma is a high-temperature fluid. Temperatures of most magmas are in the range 700 °C to 1300 °C, but very rare carbonatite magmas may be as cool as 600 °C, and komatiite magmas may have been as hot as 1600 °C.
Get Access