GRADE 11 HUMAN IMPACT ON THE ENVIRONMENT

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Across
  1. 5. destruction of natural forests through human activities
  2. 6. insect or rodent killer or poisons
  3. 9. when greenhouse gases are in balance they regulate earth’s temperature and enable life on earth The enhanced greenhouse effect
  4. 12. when a species has completely died out
  5. 13. a wide range of different things
  6. 16. underground layer of water-bearing, sponge-like rock
  7. 17. large community of plants and animals occupying a region with distinct climate conditions, e.g. grassland, desert, tundra..
  8. 19. supply of water to land or crops to help growth
  9. 21. the rise in earth’s average temperature as a result of the enhanced greenhouse effect
  10. 23. altering the genes of organisms
  11. 30. system sewers carrying sewage to a sewerage plant or place of water treatment
  12. 32. weed / plant killer
  13. 33. released gases which are usually harmful to the environment
  14. 35. severe shortage of food that causes starvation
  15. 36. change disturbance to an established climate pattern
  16. 37. natural system (soil, water or plant) which absorbs and stores carbon dioxide (CO2)
  17. 40. cleaning by removing contaminants
  18. 41. where size increases at a greater and greater rate
  19. 42. the increasing development of towns and cities
  20. 43. electricity generated by the power of water
Down
  1. 1. pollution heat pollution (in this case from hot water)
  2. 2. organisms that capture and feed off other organisms (prey)
  3. 3. returning something to a previous, better condition
  4. 4. drains and pipes
  5. 7. the variety of all living organisms on Earth
  6. 8. guarantee that nutritious food will be available to all people at all times and in sufficient quantities
  7. 10. depletion reduction in the concentration of ozone in the ozone layer in the stratosphere (upper atmosphere)
  8. 11. excessive nutrients in a waterbody causing excessive growth of algae or aquatic plants
  9. 14. footprint amount of carbon dioxide released into the air because of individual or group energy needs
  10. 15. process by which fertile land becomes desert
  11. 18. system hygienic or waterborne sewerage system
  12. 20. warming of the surface of the earth by greenhouse gases trapping heat in the atmosphere
  13. 22. the average weather conditions (temperature, rainfall and air pressure) of a large area over a long period of time
  14. 24. farming with machinery to sell products for profit
  15. 25. food for plants
  16. 26. pollution or poisoning
  17. 27. place where organisms live, including all living and non-living factors or conditions of the surrounding environment
  18. 28. gases which trap heat in the atmosphere: the two main GHGS are carbon dioxide and methane
  19. 29. all the different genes in a breeding population
  20. 30. liquid waste: water and excrement (urine and faeces) in sewers
  21. 31. greenhouse gases are emitted they trap too much heat in the atmosphere
  22. 34. farming traditionally to feed themselves to survive
  23. 38. long-distance movement of organisms, often seasonal
  24. 39. farming a single crop or breed over a large area