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Volcanoes erupt to release pressure built up in the magma chamber by expelling the magma as lava. Along with lava, a volcanic eruption releases ash and greenhouse gases such as sul...

When a volcano erupts, hot magma (molten rock), gases and volcanic ash are emitted. The explosiveness of the eruption depends on the consistency of the magma and the amount of pressure built up prior to eruption.

What happens when a volcano erupts - Edu4Hazards


An eruption begins when pressure on a magma chamber forces magma up through the conduit ... Volcanic activity is classified by how often a volcano erupts .

How It Happens | Volcanic Eruptions - Video - NYTimes.com


Jan 5, 2015 ... The eruption of a volcano can be one of the planet's most destructive events — spewing huge amounts of rock, gas and ash that can kill people.

What happens during an volcanic eruption


Volcanic hazards and prediction. What happens during an volcanic eruption: Types of volcanic eruptions are quite varied, dependent on the type of magma, the ...

Why are there volcanoes? Why do they erupt? | Volcano World ...


Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup).

Volcanoes - Weather Wiz Kids weather information for kids


The friction causes earthquakes and volcanic eruptions near the edges of the plates. The theory that ... When this happens, it commonly results in earthquakes.

Volcanic eruptions - IFRC


Volcanic eruptions happen when lava and gas are discharged from a volcanic vent. The most common consequences of this are population movements as large ...

What Happens When The World's Largest Volcano Erupts Again?


May 20, 2014 ... Of the five active volcanoes in Hawaii, only the Kilauea and Loihi volcanoes have been quietly erupting consistently for decades. But Mauna ...

BBC - GCSE Bitesize: Key facts


Volcanoes form when magma reaches the Earth's surface, causing eruptions of ... Volcanic eruptions can happen at destructive and constructive boundaries, but ...

Popular Q&A
Q: What happens when a volcano erupts?
A: A volcano is an opening from the Earth's surface into pools of liquid rock (magma) beneath the Earth's crust. The opening allows magma to expand and erupt, wher... Read More »
Source: wiki.answers.com
Q: What happens when a volcano erupts?
A: It kills living things that are in the way. Read More »
Source: answers.yahoo.com
Q: What happens when a volcano erupts?
A: When you think of a volcanic eruption, you probably imagine red-hot lava flowing down the side of a volcano. Lava is a serious hazard, but there are others--som... Read More »
Source: www.learner.org
Q: What happens when a volcano erupts?
A: When a volcano erupts, large amounts of noxious gases, steam, rock, and ash are released into the atmosphere, and can be transported thousands of miles from the... Read More »
Source: www.opc.ncep.noaa.gov
Q: What happens when a volcano erupts?
A: Put these sentences in order to describe what happens when a volcano erupts. Read More »
Source: www.quia.com