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Volcanoes

By Alex Allen

Magma is hot rock inside the volcano

http://images.google.com/imgres?imgurl=http://www.cgrove417.org/FRY/Science/Volcanoes/VolcanoGraphics/MagmaChamber.GIF&imgrefurl=http://www.cgrove417.org/FRY/Science/Volcanoes/Formationof%2520volcano.html&usg=__JqwtWPepZ2TVUlAa2aTtbqyPFus=&h=309&w=323&sz=78&hl=en&start=1&tbnid=YRT66PzkwLWmrM:&tbnh=113&tbnw=118&prev=/images%3Fq%3Dmagma%2Bchamber%26gbv%3D2%26hl%3Den

When magma comes out in an eruption it is lava

http://images.google.com/imgres?imgurl=http://www.swisseduc.ch/stromboli/glossary/icons/paehoe_lava.jpg&imgrefurl=http://www.swisseduc.ch/stromboli/glossary/pahoehoe-en.html&usg=__5Hr4LV5JTCU2IxoYjgltWNt99dA=&h=473&w=729&sz=87&hl=en&start=8&tbnid=z2XGDiFBD8Qm7M:&tbnh=91&tbnw=141&prev=/images%3Fq%3Dlava%26gbv%3D2%26hl%3Den

When volcanoes erupt they send out toxic dust and rock known as

pyroclastic flow

http://images.google.com/imgres?imgurl=http://www.geo.umn.edu/courses/1001/Summer_Session/img011.JPG&imgrefurl=http://www.radioparadise.com/content.php%3Fname%3Dsonginfo%26song_id%3D41070&usg=__fjAWR71Gf-o2f5B52N6zZonFEtA=&h=643&w=764&sz=132&hl=en&start=3&tbnid=NgP1oKJvJhVG2M:&tbnh=120&tbnw=142&prev=/images%3Fq%3Dpyroclastic%2Bflow%26gbv%3D2%26hl%3Den

Pyroclastic flow can drop the climate several degrees

http://images.google.com/imgres?imgurl=http://mstecker.com/images/antarctica/antarcticaHP/I39IB1.JPG&imgrefurl=http://mstecker.com/pages/antarctica_fp.htm&usg=___0BNJTHXsPwfMCJs9VaepEQmShc=&h=333&w=500&sz=30&hl=en&start=15&tbnid=gdhOccPjQqRP7M:&tbnh=87&tbnw=130&prev=/images%3Fq%3Dantarctica%26gbv%3D2%26hl%3Den

These effects can be felt across the globe

Russia’s crops froze because the tempeture droped