Earth Sci Periodical

• Obsidian

  • Glass-like structure
• Hardness

  • Resistant to scratches
• Aphanitic

  • Fine-grained rock
• Anthracite

  • Highest form of coal
• 3 main characteristics of minerals

  • Organized structure of atoms/fixed chemical composition
  • Naturally occurring
  • Inorganic
• Why does Eutrophication happen?

  • Too much nutrients in bodies of water
• Algal bloom

  • Evident effect of Eutrophication
• Blue Baby Syndrome

  • Too much intake of nitrates
• Minerals with high density are also minerals with high pressure
• What does BOD mean?

  • Biochemical Oxygen Demand
• Runoff

  • Carry nutrients from yard > streams > rivers
• Denitrification

  • Glucose breakdown
• Cellular Respiration

  • Happens at night
  • Oxygen > palabas
• Photosynthesis

  • Happens in the morning (when there is sun)
  • Process of plants making food
• MOHS Scale of Hardness

  • Scale used to determine the scratch resistance of minerals
• Enumerate the minerals in the MOHS Scale (1-10)

  • Talc
  • Gypsum
  • Calcite
  • Fluorite
  • Apatite
  • Orthoclase
  • Quartz
  • Topaz
  • Corundum
  • Diamond
• Cryptocrystalline

  • Minerals composed of tiny crystals
• What is the relationship of BOD to Oxygen?

  • Inversely Proportional
• Phaneritic

  • Opposite of Aphanitic
• Low Dissolved Oxygen

  • Happens when there is high BOD
• High Dissolved Oxygen

  • Happens when there is low BOD