5. sediment – pieces of material; sediment can range in size from boulders to gravel, sand, silt and dissolved materials
6. meander – bends, or “S” shapes in a river cause by river currents slowing down in flat land and dropping sediment Click here to learn more about rivers and coasts!
7. flood plain – flat landscape near rivers; the rivers flood the land from time to time and create very fertile soil.
8. mouth (of river) – where a river empties into the ocean; river currents slow when they hit the ocean and drop sediment
9. delta – a fan-shaped piece of land that forms from sediment dropped at the mouth of a river
10. water gap – a rare, narrow, steep-walled canyon created as water cut through hard rock
11. valley – formed when small channels are deepened and widened by erosion
12. canyon – a deep, V-shaped valley that is usually created as a result of both water cutting into earth and geological forces pushing earth upward
13. dune – sand hill created by wind erosion; found in deserts or at the beach
14. landslide – when water saturates the land and makes soil loosen and fall; gravity can create landslides, too