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How Do Minerals Form?

How Do Minerals Form?. In general, minerals can form in one of two ways: Crystallization of molten material Crystallization of materials dissolved in water to form solutions. What is crystallization?. Process by which atoms are arranged to form a material with a crystal structure.

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How Do Minerals Form?

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  1. How Do Minerals Form? In general, minerals can form in one of two ways: • Crystallization of molten material • Crystallization of materials dissolved in water to form solutions.

  2. What is crystallization? • Process by which atoms are arranged to form a material with a crystal structure.

  3. What is magma? • Magma is molten material from inside the Earth that hardens to form rock. • Lava is magma that reaches the surface. Which one dries faster – magma or lava?

  4. How do crystals form from molten material? • When hot magma cools inside the Earth, or as lava hardens on the surface. They form crystals. • Notice the crystals in this granite. Compare and contrast the two samples. Why the difference?

  5. What determines the size of the crystals? • Magma deep below = cools slowly = large crystals • Magma closer to the surface = cools faster = medium crystals • Lava = cools rapidly = small crystals Slow Fast

  6. How do minerals form from solutions? • When elements and compounds that are dissolved in water leave a solution, crystallization occurs. The Cave of Crystals in Mexico

  7. How do minerals form from solutions? • Minerals formed by evaporation ( Ex: Halite (salt) forms when ancient seas evaporate) • Minerals from hot water solutions (Ex: Veins of silver)

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