MLEG4.2

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Vocabulary
Vain :a narrow slab of a mineral that is sharply different from the surrounding rock Solution: a mixture of which one substance is dissolved in another.

outline

 * The ways minerals form
 * There are two general ways most minerals form.
 * Crystallized from melted materials.
 * Crystallized from materials that have dissolved in water.
 * Minerals from Magma
 * When magma cools inside the crust, minerals form.
 * Crystal size
 * How fast magma cools, how much gas the magma has, and the chemical composition of the magma all effects the crystal size.
 * Minerals formed by hot water solutions
 * During the process of cooling, the hot water solution makes crystals.
 * Minerals from Evaporation
 * When solutions evaporate, they leave crystals.
 * An example is halite.
 * Halite is from evaporated sea-water.
 * Places where there are minerals
 * The crust of the Earth is mostly made up of minerals combined in different type of rocks.
 * Rare minerals and rocks are not evenly spread around the Earth's crust.