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Biomes (world climate (Earth tilt (on axis, 23.5 degrees, controls…

- - - - extreme dry
      - no fresh water
    - - one side rainfalls
      - rain shadow affect
- - - - rain reliably present
      - brief summer dryness
      - giant long lived conifers
    - - rain shadow affect :mountain:
      - mixed conifer forest
      - soil shallow and rocky
      - acidic
    - - cold winter/warm summers
      - high percipitation
      - tall broadleaf deciduous trees
    - - warmer winters
      - soil sandy and porous :hourglass_flowing_sand:
      - longleaf pine
  - - - flat with low rolling hills
      - drier climate
      - rich soil
    - - trees/shrubs widely spaced
      - savanna
        
        is grass grows between trees
      - high clay content
      - mild winter/hot summer
    - - driest region
      - can be cold or hot
      - rocky and thin soil
    - - highest point where trees live on mountains
      - cold most of year
      - short growing season
      - thin soil
  - - - dry areas
      - low precipitation
      - permafrost :snowflake:
      - short growing season
      - soil high clay
    - - taiga
      - broad band of forest
      - coniferous
  - - - high precipitation :sweat_drops:
      - high temperatures :hotsprings:
      - angiosperms
    - - lower rainfall
- - - - life all aquatic :ocean:
      - Eurasia
      - Gondwanaland
        
        South America
        
        Africa
        
        Australia
        
        Antarctica
    - - life moving to land
      - Laurasia
      - Pangaea
    - - Pangaea seperation
      - Tethys Sea