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RIVER LANDSCAPES (characteristics of a river (the characteristic…

- - - - compresses air in cracks
        
        puts more pressure and pieces of rock may break off
- - - - carbonates in limestone are dissolved by these weak acids and this causes rock to break up or disintegrate
  - - - moisture (rain) causes seedling to grow
        
        roots force their way into cracks
        
        as the roots grow they break up the rock
  - - - when temp. falls, water turns into ice
        
        expansion puts pressure on rocks
        
        fragments of rock may break off
    - - tem is above freezing during day and below during night