C1 Air Quality

Created by: Katiemarie1502
Created on: 16-05-17 19:29

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C1 Air Quality
- the evolution of the atmosphere
  - Phase 1: Volcanoes Gave Out Gases
    - Earths surface was molten
      - so hot any atmosphere boiled away
        cooled down thin crust formed.
    - volcanoes kept erupting
      - carbon dioxide, water vapour, nitrogen
        early atmosphere mostly C02 water vapour virtually no O2
        Oceans formed when water vapour condensed when earth cooled
  - Phase 3: Complex Organisms Evolved
    - build up of O2 killed off some organisms more complex ones evolved
    - virtually no CO2 left now
  - Phase 2: Green Plants Evolved and Produced Oxygen
    - green plants evolved over most of earth and where happy in CO2
      - they removed CO2 and produced O2 via photosyn-
        when plants died carbon became locked up in sedimentary rocks as insoluble carbonates and fossil fuels
      - some CO2 dissolved in oceans
- The atmosphere today
  - pollutants
    - human activity
      - burning fuels in power stations and vehicles
    - Nature
      - gases and particulates from volcanos
    - effects
      - direct harm e.g death CO reduces amount of O body can carry
      - indirect harm = damaging environment SO2 cause acid rain pollutes water sources killing fish which people eat CO2 climate change rising sea level
  - Nitrogen 78% Oxygen 21% Argon 1%
    - small amounts of CO2, other gases and water vapour
    - Constant
- fossil fuel
  - fossil fuels are hydrocarbons
    - they contain just H and C
    - petrol diesel and fuel oil are mixtures of hydrocarbons
      - only difference between different fuels is the size of the HC they contain
  - formed from remainsdead plant sand animals over millionsyears
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C1 Air Quality

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