brain teaser how could all of your cousins have an aunt who is not your aunt?
TRANSCRIPT
Brain TeaserHow could all of your cousins have an aunt who is not your aunt?
Mineral - definition
• Naturally occurring• Inorganic• Solid• Specific atomic composition• Definite atomic structure
Mineral Identification
• 1. Hardness• 2. Streak• 3. Cleavage/Fracture• 4. Luster• 5. Specific Gravity• 6. Color
Hardness• Is measured by how easy it is to
scratch. • Geologists order the hardness by…1. Scratched by a fingernail.2. Scratched by a penny. 3. Scratched by a nail. 4. Scratched by a diamond. These are not all of the tools geologists
use, but it will work for our experiment.
Mineral Identification• Hardness – the ability to resist scratching; ranges from 1
(softest) to 10 (hardest)
Mineral Systems
• If space is not restricted, a mineral will exhibit a crystal pattern with a definite number of sides and specific angles.
Mineral Identification
• _________ – the color of the powdered form of a mineral
Streak
Mineral Identification
• Cleavage (flat surfaces) or Fracture (no flat surfaces) – the way a mineral __________ breaks
Mineral Identification
• Fracture: ___________________• Ex. Quartz or obsidian
Mica is probably the best example as it splits into thin sheets. It is said to have
one perfect cleavage.
Calcite and Galena cleave in three directions.They are said to have three good cleavages.
Not all minerals show cleavage.Those that don’t break along cleavage
surfaces are said to have fracture.
Terminator Baby
Luster• Refers to the way light
reflects from the surface of the mineral.
• There are two types of luster, –Metallic: looks like polished metal.
–Nonmetallic: does not look like polished metal. • Nonmetallic can be shiny or dull.
Pyrite has metallic luster
Quartz has nonmetallic luster
Specific Gravity of a Mineral
One mineral property we will not use…
COLOR
A mineral can be many different colors. Below is Mica.
Brain Teasers1. Mary’s father has 5 daughters – Nana, Nene,
Nini, Nono. What is the fifth daughters name?
2. In a one-story pink house, there was a pink person, a pink cat, a pink fish, a pink computer, a pink chair, a pink table, a pink telephone, a pink shower– everything was pink! What color was the stairs?
Review
Parrot dance
Silicates Non Silicates
COMMON MINERALS IN THE EARTH
• QUARTZ (Silica) SiO2
• CORUNDUM (Alumina) Al2O3
• HEMATITE Fe2O3
• CALCITE CaCO3
• DOLOMITE CaMg(CO3)2
• GYPSUM CaSO4
• FLUORITE CaF2
• PYRITE FeS2
• OLIVINE (Mg,Fe)2SiO4
• PYROXENE (Mg,Fe)SiO3
• AMPHIBOLE (Ca2Mg5)Si8O22(OH)2
• FELDSPARSAlbite NaAlSi3O8
Orthoclase KAlSi3O8
Anorthite CaAl2Si2O8
• KAOLINITE Al2Si2O5(OH)4
Discovery Channel : Salt
Common minerals and their uses