• Weathering and erosion modify Earth's surface landscapes over time.
  • Water erodes far more material than any other erosional agent.
  • Wind is important as an agent of erosion in arid climates.
  • Ice, in glaciers, can erode enormous quantities of sediments.
  • Plate tectonics forces work to build huge mountains and other landscapes.
  • Conversely, the forces of weathering gradually wear down those rocks and landscapes.
  • Together with erosion, tall mountains turn into hills and even plains.
  • Weathering breaks down Earth's materials into smaller pieces.
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