RLAF+4.2

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Vocab

 * solution-** a mixture when one substance dissolves in another
 * vein-** a narrow channel or slab of mineral that is different from surrounding rock

Outline

 * Processes That Form Minerals**
 * minerals have formed over a billion years ago
 * minerals can form in two different ways
 * minerals form through crystallization of melted material
 * minerals form through crystallization of material dissolved in water


 * Minerals From Magma**
 * the way minerals are formed are from magma
 * when magma becomes lava, the lava cools and forms crystals
 * those crystals form from the lava
 * the lava cools quickly, and forms many crystals


 * Minerals From Hot Water Solutions**
 * another way minerals form is from solutions
 * minerals usually are from magma, but sometimes it melts
 * the minerals form through solutions, which is a mixture of dissolved substances
 * when the solutions start cooling, crystals form, and the crystals form minerals
 * a vein is a slab of rock that is different from surrounding rock
 * solutions of hot water often fall down the veins
 * minerals form solutions at the mid-ocean ridge
 * the mineral's form because of the crust.



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