volcano_pic.jpgvol=).jpg

ring-of-fire-plates.jpg Volcanoes


There are 3 types of volcanoes: shield, cinder cone, and composite. When magma spews out of the volcano, it is called lava. The most common and most destructive volcanoes are Mt. Fuji, Mount St. Helens, and Mauna Loa.

The Ring of Fire is a ring of volcanoes surrounding the Pacific, Philippines, South America, Nazca, Coco, and Caribbean Plates.

There is always an earthquake during a volcanic eruption. This happens because magma is forcing its way through Earth's crust until it reaches the surface, becoming lava. If the lava is very thick, it will move slowly down the slope. If the lava is very thin, it will move quickly. As the magma forces its way up the central vent, it breaks off internal parts of the volcano, carrying it up with it.

Scientists can never pinpoint when an volcanic eruption is going to happen.

A volcano will form when a weak point appears in the Earth's crust from the build up of pressure forming in the mantle. When the lava is spewing from the ground, it will form a mound that eventually grows into a hill, then becoming a mountain. The more pressure the magma causes, the more of an outburst causes more fire, ash, lumps of rock, and lava.

Volcanoes effect people in good ways and in bad ways. The lava flows may destroy houses, buildings and cause major damage to the surrounding areas. The lava flows also bring out rare minerals and provides rich soil for farming and different assortment of crops.

Underwater volcanoes form like all volcanoes, and that is from magma forcing its way through the cracks in the sea floor. Volcanic arches may start out as an underwater volcano.




Resources

www.google.com
www. ask.com