Unit+5+Volcanoes

**Volcanoes**
=Videos, Tutorials and Websites= [|Volcanoes 101 Video] [|Anatomy of a Volcano] [|Volcano Explorer Animation] [|Forecasting Volcanoes] [|Plate Tectonics: The Hawaiian Archipelago] [|Understanding Volcanoes] [|Volcanic Formation] [|Yellowstone is a Volcano????]

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=Hot Spots= Hot spots are unusually hot places in the mantle where the magma plumes upward in a tube-like fashion. As the tectonic plate moves, the new crust created builds up and creates island volcanoes. The Hawaiian Islands are a hot spot[|Hot Spots - The Hawaiian Islands] [|Hot Spot Animation]

=Ring of Fire= [|Ring of Fire Information] [|Ring of Fire Video]

=Island Arcs= Island arcs form at subduction zones and hot spots. Examples at subduction zone are the Japanese Islands and Aleutian Islands of Alaska. The Hawaiian Islands are a hot spot island arc. [|Island Arcs] [|Animation] [|Island Arc Formation]

[|Hydovolcanoism: When Magma and Water Mix] =Types of Volcanoes= [|Composite Volcanoes Video - Mt. St. Helens] [|Cinder Cone Volcanoes]
 * [|Mt. St. Helens Before and After]**
 * Shield Volcanoes**

Magma

==Magma is liquid or partially molten rock beneath the Earth's surface. When magma erupts onto the surface, it is called [|lava]. Magma typically consists of (1) a liquid portion (often referred to as the melt); (2) a solid portion made of minerals that crystallized directly from the melt; (3) solid rocks incorporated into the magma from along the tube or reservoir, called xenoliths or inclusions; and (4) dissolved gases==

Sketch of a magma reservoir beneath a volcano and a tube leading up to a lava dome at the surface. Arrow indicates direction of magma movement from a deeper source.

Lava Lava is the word for magma (molten rock) when it erupts onto the Earth's surface. Geologists also use the word to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, lava bombs or blocks). Lava is from the Italian word for stream, which is derived from the verb lavare--to wash.

=Games and Practice:= ==[|Label Parts of Volcano]==


 * Things From Class**