River tees

• What are the two types of erosion mentioned?

  Vertical and lateral erosion
• How does vertical erosion affect a river valley?

  It creates steeper and wider valleys
• What happens to rocks as a river downcuts?

  Steeper sides are eroded and widened
• What is a meander in the context of river erosion?

  A bend in the river that erodes sideways
• What forms when a river erodes through the neck of a meander?

  An ox-bow lake
• What are the characteristics of U-shaped valleys formed in the upper course of a river?

  • Formed by glacial erosion
  • Steep sides and flat bottoms
  • Characterized by vertical erosion
• How does the presence of numerous rocks and debris affect river erosion?

  It creates both vertical erosion and wider valleys
• What is the effect of abrasion on riverbed rocks?

  It smooths and shapes the rocks
• What happens to a meander when it is sealed off by deposition?

  It forms an ox-bow lake
• What is the primary process that leads to the formation of ox-bow lakes?

  Erosion through the neck of a meander
• How does lateral erosion differ from vertical erosion in rivers?

  Lateral erosion widens the river valley