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L1 ap drainage basin and river processes
- 1. What are thefive main processes that effect the river landscape?
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- 4. What are thefive main processes that effect the river landscape?
- 5. What are thefive main river processes? Erosion Transportation Deposition Mass Movement Weathering
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- 9. Hydraulic Action • Thesheer _______ of water hitting the bed and banks. Most effective when ______ volumes of water are moving ______. a) Weight small fast b) Force large fast c) Power bigger forward
- 10. Abrasion • The ______in the river repeatedly hits the river bed and banks, causing __________ to break off. a) Load material b) Rocks china c) Water banks
- 11. Solution • When the_______ flows over certain types of rock, such as chalk and limestone, the rock __________in the water. a) Steam repels b) River dissolves c) Water disappears
- 12. Attrition • ______ andboulders knock against each other, over time pieces fall off and the particles reduce in ______. a) Water size b) Stones size c) People size
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- 15. Traction • __________ rocksand other large pieces of sediment along the ______ bed a) Floating sea b) Trundling bunk c) Rolling river
- 16. Saltation • ________ piecesof sediment or sands are ___________ along the river bed a) Fine bulldozed b) Small bounced c) Large bounced
- 17. Suspension • Very smallparticles such as ________ or sands are carried in the water. This gives the water a ___________ look. a) Clays cloudy b) Stones dirty c) Granite cute
- 18. Solution • Some ___________can become ____________ into the river. This requires the least energy. a) Minerals dissolved b) People engulfed c) Streams tributaries
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- 23. Deposition • This iswhen a river ______ the load it is carrying when its energy levels drop. This happens when there is a drop in the river’s v_______or a drop in the v______of water flowing. • Normally the bigger, ________particles are deposited first, whilst smaller particles are dropped last. Deposition often occurs at the _______of a river as it flows into a lake or sea.
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- 27. Soil Creep • Whenparticles of soil _________move down the slopes (towards a ________)
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- 29. Sliding • When materialmoves downslope in one ____, e.g. a ___________. This could be caused by undercutting from erosion at the bottom of the _____ .
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- 31. Flows • Soil, oftenmixed with water, flow like ______ downhill _____.
- 32. 5. Weathering What canyou remember from coasts?
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- 36. Homework • Using theprocesses of a river (erosion, transportation or deposition) produce a poem or a recipe or a story about that process! Example poem: Erosion wears the river banks away, The rocks are so brittle they easily fray. Always flowing and carrying the load, Hydraulic action causes the rocks to almost explode! Example recipe: Ingredients: …………. Erosion: Take soluble minerals as river flows and dissolve them to make solution Transportation: Pick up a handful of rocks and throw them so they skip along the river bed
- 37. You say wepay • River • Erosion • Landslide • Flood • Soil creep
- 38. You say wepay • Tree roots • Transport • Deposition • Biological weathering • Hydraulic Action
- 39. Homework • Choose oneprocess (not deposition) and find photographs that show the different types of that process. • Print them off and label them in your exercise book.