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263027686274175

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    263027686274175 263027686274175 Presentation Transcript

    • Minerals, Rocks and Fossils
    • What is a mineral?
      • Naturally occurring
      • Non-organic
      • Characteristic chemical composition
      • Distinctive physical properties
      • Crystalline structure
    • Mineral properties
      • Color
      • Luster
      • Habit (Shape)
      • Cleavage & Fracture
      • Streak
      • Hardness
      • Other
    • Color:
      • Not mineral specific
    • Luster:
      • How minerals reflect light
      Non-metallic Metallic
    • Mineral Habit (Shape)
      • Shape a mineral takes if grown unimpeded
      • Mineral Java Applet
    • Cleavage & Fracture
      • Cleavage: planes of weakness along which minerals can break
      • Fracture: surfaces along which minerals can break
    • Cleavage & Fracture Best identified on a fracture surface
    • Streak:
      • The powdered form of a mineral
    • Hardness:
      • Based on Moh’s scale of hardness
    • Other Properties
      • Specific gravity
      • Reaction to acid
      • Striations
      • Magnetism
    • Classifying Rocks
      • Rocks are classified by how they formed and what they’re made of
      • There are 3 general classes of rocks
      • Igneous Rocks …are formed when lava and magma crystallize to form solid rock
      • Metamorphic Rocks …are formed when an existing rock is partially melted, squeezed, or both
      • Sedimentary Rocks …are formed when sediments (sand clay, and silt) are compressed and become solid rock
    • Igneous Rocks
    • Metamorphic Rocks Gneiss Schist
    • Sedimentary Rocks Shale Conglomerate Sandstone
    • Fossils The remains or imprints of living things of the past found in Sedimentary rocks.
    • Fossils provide information about life and conditions in the past.
    • Fossils of Sea Creatures
      • Oceans once covered the area
      • What part of the ocean
    • Fossils of Plants
      • Plant fossils can tell us about the ancient environment
    • Animal Fossils
      • Animal fossils can tell us
        • About past environments
        • What the animal ate
        • How they lived