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Weathering and erosion

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Weathering and erosion

  1. 1. What is happeningto the rock in allthree cases?
  2. 2. Date The difference between weathering and erosionWeathering = ROCKS BREAK UPErosion = ROCKS WEAR AWAY
  3. 3. Now the difficult bit….Rivers erode in 5 main ways:1. The river ‘bashes’ sand and stones against the banks Can you think of what2. As river water is acidic, it can dissolve the banks away some of them might be?3. The water itself forces cracks apart4. As they get washed along by the river, stones knock into each other5. The river scrapes stones along its bedWrite this down under your previous note about weathering and erosion – LEAVE 2 LINES BETWEEN EACH NUMBER
  4. 4. Can you match the words to the meanings? 1. The river ‘bashes’ sand and stones against the banks 2. As river water is acidic, it can dissolve the banks away 3. The water itself forces cracks apart 4. As they get washed along by the river, stones knock into each other 5. The river scrapes stones along its bed corrosion abrasion Now add the terms to your notes corrasion hydraulic action attrition
  5. 5. Now……how to remember thewords and meanings
  6. 6. Corrasion Cor! Aaah!Fire hydrant
  7. 7. Corrosion Chemical erosionRock most susceptible? Why?
  8. 8. Hydraulic action(1)Spelling – hydraulic not hydrolic(2)What does ‘hydr’ refer to?(3)Air in cracks compressed
  9. 9. Attrition Onomatopoeic?Rock demo – angular or smooth
  10. 10. AbrasionA medical term….

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