Weathering- rivers

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  • Weathering
    • Rocks in drainage basin broken down by weathering
  • Breakdown of rock by changing its chemical composition
    • 2. Chemical Weathering
    • e.g. Carbonation Weathering-happens in warm & wet conditions
      • 1. rainwater has C02 dissolved in it-makes weak carbonic acid
        • 2. Carbonic acid react with rocks (that contains calcium carbonate) so rocks dissolve by rainwater

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