Term 3 Revision Crossword

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Across
  1. 5. and lower course
  2. 7. Red or green plants growing on rocks, breaking them down slowly through chemical weathering.
  3. 8. Forces - Natural physical processes contributing to weathering.
  4. 11. Natural mounds on riverbanks.
  5. 12. The movement of weathered materials by agents such as water, wind, or ice.
  6. 14. Course - Characterized by steep terrain and vertical erosion.
  7. 16. Contamination of soil by chemicals or pollutants, often resulting from industrial or mining activities.
  8. 19. Agents: Wind, water, and ice.
  9. 20. Formed where rivers flow into seas, involving deposition and the splitting of the river into smaller channels.
  10. 21. A chemical reaction occurring in silicate-rich rocks like granite and sandstone, turning them into clay when exposed to water.
  11. 23. Formed when increased water speed increases downward erosion.
  12. 27. Activities like burrowing/digging weaken soil and expose rocks to various weathering processes.
  13. 28. The process of clearing large areas of forests, often for purposes such as agriculture, construction, or logging, which exposes the underlying soil.
  14. 29. Deep valleys formed by downward erosion.
Down
  1. 1. Sudden drops in river gradient.
  2. 2. Chemical reaction involving carbon dioxide (CO₂) dissolving in rainwater, forming carbonic acid (H₂CO₃) and changing the composition of rocks.
  3. 3. Faster-flowing sections without a sudden drop in height.
  4. 4. The process of breaking down rocks and soil by natural forces.
  5. 5. A farming practice where a single crop is grown continuously in the same area, leading to the depletion of specific nutrients in the soil and increased soil erosion risk.
  6. 6. A farming method that involves planting different crops in a specific order or cycle to maintain soil fertility and reduce erosion.
  7. 9. Forces - Weathering caused by plants, animals, and human activities.
  8. 10. The settling of eroded materials in new locations.
  9. 13. Activities like construction, mining, and agriculture impact land and can increase weathering.
  10. 15. Common in dry areas with extreme day-night temperature differences, causing the outer layers of rocks to peel away.
  11. 17. Forces - Chemical reactions that weaken and break down rocks.
  12. 18. The materials (e.g., sand, stone, silt) carried by a river.
  13. 22. The excessive feeding of animals on a particular area of land, leading to the removal of vegetation and soil vulnerability.
  14. 24. The weathering reaction in iron-rich rocks, leading to the formation of reddish iron oxide (rust).
  15. 25. Thaw Action
  16. 26. The path of a river, including upper, middle, and lower sections.