RLAF+3.1

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Volcanoes and Plate Tectonics
Vocabulary: **Magma-**molten-mixture of rock-forming substances, gases, and water from the mantle
 * Lava-**when magma reaches the surface, it's called lava
 * Ring of Fire-**a major volcanic belt, formed by the many volcanoes
 * Island Arc-**resulting volcanoes make a string of islands
 * Hot Spot-**an area where magma within the mantle melts

Outline

 * What is a Volcano?**
 * Volcanoes
 * dangerous
 * awe-springing events
 * weak spots in crust
 * Inside
 * has molten material and magma
 * Magma
 * a molten mixture of rock-forming substances
 * gases
 * waters
 * from mantle
 * lava
 * when magma reaches the surface
 * Location of Volcanoes**
 * many volcanoes
 * 600 active volcanoes on land
 * many more below sea
 * Ring of Fire
 * a whole line of active volcanoes rims the pacific ocean
 * Volcanic Belts
 * form along boundaries
 * huge pieces of crust diverge
 * Volcanoes at Diverging Plate Boundaries**
 * Volcanoes
 * form along mid-ocean ridge
 * marks a diverging plate boundary
 * few places mid-ocean ridge rises above ocean surface
 * Iceland
 * Azores Island
 * Volcanoes at Converging Boundaries**
 * formed volcanoes
 * near plate boundaries
 * occurrences of volcanoes
 * usually on land
 * Island Arc
 * string of islands
 * formed by volcanoes
 * Hot Spot Volcanoes**
 * Hot spot
 * mantle from deep within the mantle melts
 * often lie in the middle of continental plates
 * on ocean floor
 * gradually forms