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4.1. What is a mineral?!?!. Objectives for 4.1. Define a mineral Describe how minerals form Classify minerals according to their physical and chemical properties Main idea:

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4.1

What is a mineral?!?!

objectives for 4 1
Objectives for 4.1
  • Define a mineral
  • Describe how minerals form
  • Classify minerals according to their physical and chemical properties

Main idea:

Minerals are naturally occurring, , inorganic compounds or elements with a definite chemical compostionand ___________________

little side note on minerals
Little side note on minerals
  • Early humans painted on rock walls made from red & yellow pigments in soils (hematite & ochre)
  • Countries have fought wars and trade companies battled over deposits of table salt (halite)
  • Today, we build our houses out of dry wall (gypsum), cement out of lime (calcite), and extract aluminum from bauxite to make aluminum foil and soda cans

I FEEL MY IGNORANCE DEPLETING!!

mineral characteristics
Mineral Characteristics
  • Earth’s crust:
mineral characteristics1
Mineral Characteristics
  • Naturally occurring:
  • Inorganic:
  • Definite chemical composition: each mineral has unique chemical composition to identify itself
  • Salt or Halite (NaCl)
  • Muscovite (KAl2(AlSi3O10)(OH)2)
  • Graphite ( C )
mineral characteristics2
Mineral Characteristics
  • Definite crystalline structure:
rock forming minerals
Rock-Forming Minerals
  • _______ of the 30 most common minerals
  • Primarily composed of the ____ most common elements in the Earth’s crust
  • Oxygen (46.6 %)
  • Silicon (27.7%)
  • Aluminum (8.1 %)
  • Iron (5%)
  • Calcium (3.6 %)
  • Sulfur (2.8%)
  • Potassium (2.6 %)
  • Magnesium (2.1 %)
  • Other (1.5%)
minerals from magma
Minerals from magma
  • What is magma?
  • Density of magma:
  • What minerals form from magma are based on 2 things:

Rate at which magma cools is important

minerals from solutions
Minerals from solutions
  • Saturated solution:
  • Supersaturated solution:
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