Environment

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  • Environment
    • Measuring environmental change
      • Measured using living indicators
        • Some organisms are very sensitive to environmental change - living indicators
        • Air pollution - lichen
        • Raw sewage - bacteria take up oxygen - less mayfly
      • Also measured by non-living indicators
        • Satellites measure temperatureof the surface of the sea and amount of snow
        • Automatic weather stations - atmospheric temperature
        • Rainfall - rain gauges
        • Dissolved oxygen meters - water pollution change
    • Energy transfer and decay
      • The sun's energy
        • Source of nearly all life on Earth
        • Green plants and algae use a small percentage for photosynthesis
          • Energy makes it's way through food chain
        • Respiration supplies energy for all life processes
          • Most energy lost as heat
        • Some materials in animals and plants are inedible
          • Don't pass energy in food chain
            • Energy lost as waste material
            • Why food chains don't have more than five levels - energy is lost
      • Elements cycle in the food chain because of decay
        • Living things take materials from the world
        • Plants turn carbon etc. into complex material
        • Elemets rturned as organisms die or as their waste products
          • Elements decayed by microorganisms - back in soil
        • Microorganisms work best in warm conditions and with lots of oxygen like compost bins
        • In stable communities the cycle is balanced
    • The carbon cycle
      • How Carbon is recycled (CO2 IN AIR)
        • Carbon compounds in plants
          • Respiration
        • Carbon compounds in animals
          • Respiration
          • Animals eat plants
            • Carbon compounds in plants
              • Respiration
          • Animals death and waste goes into soil
            • Carbon compounds in the soil being decayed by microorganisms
              • CO2 released from decay
          • Products made from plants and animals
            • Burn
        • Fossil fuels
          • Burn
        • Carbon compounds in the soil being decayed by microorganisms
          • CO2 released from decay
        • WHOLE THING IS POWERED BY PHOTOSYNTHESIS

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