Atmosphere

Cards (10)

  • Composition of the air (now)
    • Nitrogen 78%
    • Oxygen 21%
    • Argon 0.9%
    • Other gases 0.1%
  • Role of Atmosphere
    • Support life
    • Protects us from the Sun
    • Traps heat in
  • How oxygen levels increased
    Algae & primitive plants photosynthesise releasing oxygen as a product
  • How CO₂ levels decreased
    1. CO₂ dissolved in the oceans
    2. Plants & algae photosynthesise (CO₂ is a product) and trapped in sedimentary rock
  • Early Atmosphere components
    • Made up of Hydrogen , water vapour and ammonia
  • Pollutants of the atmosphere
    • Sulfur dioxide
    • Combustion of sulfur in fuels
    • Combustion of nitrogen
    • Carbon monoxide
    • Carbon dioxide
    • Incomplete combustion
    • Complete combustion
  • Main greenhouse gases
    • CO₂, H₂O, CH₄ (Methane)
  • Effects of global warming
    • Glaciers melt
    • Sea levels rise
    • Rainfall patterns change
  • Greenhouse effect
    • Main greenhouse gases(carbon dioxide, water vapour and methane)
    • Earth emits infrared radiation
    • This is trapped by thick layer of greenhouse gases
    • warming the atmosphere up
  • Early atmosphere
    • Algae and plants began to photosynthesise
    • levels of co2 goes down(reactant)
    • Oxygen levels increase(product)
    • Earth cools and water vapour condenses
    • Oceans and the crust form
    • Ammonia reacts with oxygen to produce nitrogen