full transcript

From the Ted Talk by Kate Slabosky: Can the ocean run out of oxygen?

Unscramble the Blue Letters

Besides sunlight and C02, algae growth also depdnes on nutrients like phosphorus and nitrogen. While such resources are typically in short supply, sometimes the surrounding watershed can flood coastal waters with these nutrients. For example, a large rainstorm might wash nutrient-rich seenimdt from a fosret into a lake. These aidatnodil resources lead to a massive increase in algae growth known as eutrophication. But rather than pidrinvog more food and oxygen, this surge of growth has deadly consequences. As more algae grows on the suafrce, it blocks sunlight to the pltans below. These light-deprived plants die off and deospmoce in a process which uses up the water’s already delepted oxygen supply. Over time, this can reduce the oxygen content to less than 2 milligrams of oxygen per liter, creating an uninhabitable dead zone.

Open Cloze

Besides sunlight and C02, algae growth also _______ on nutrients like phosphorus and nitrogen. While such resources are typically in short supply, sometimes the surrounding watershed can flood coastal waters with these nutrients. For example, a large rainstorm might wash nutrient-rich ________ from a ______ into a lake. These __________ resources lead to a massive increase in algae growth known as eutrophication. But rather than _________ more food and oxygen, this surge of growth has deadly consequences. As more algae grows on the _______, it blocks sunlight to the ______ below. These light-deprived plants die off and _________ in a process which uses up the water’s already ________ oxygen supply. Over time, this can reduce the oxygen content to less than 2 milligrams of oxygen per liter, creating an uninhabitable dead zone.

Solution

  1. plants
  2. surface
  3. decompose
  4. forest
  5. depleted
  6. depends
  7. sediment
  8. providing
  9. additional

Original Text

Besides sunlight and C02, algae growth also depends on nutrients like phosphorus and nitrogen. While such resources are typically in short supply, sometimes the surrounding watershed can flood coastal waters with these nutrients. For example, a large rainstorm might wash nutrient-rich sediment from a forest into a lake. These additional resources lead to a massive increase in algae growth known as eutrophication. But rather than providing more food and oxygen, this surge of growth has deadly consequences. As more algae grows on the surface, it blocks sunlight to the plants below. These light-deprived plants die off and decompose in a process which uses up the water’s already depleted oxygen supply. Over time, this can reduce the oxygen content to less than 2 milligrams of oxygen per liter, creating an uninhabitable dead zone.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
dead zone 4
dead zones 2
algae growth 2
coastal waters 2
human activity 2

Important Words

  1. additional
  2. algae
  3. blocks
  4. coastal
  5. consequences
  6. content
  7. creating
  8. dead
  9. deadly
  10. decompose
  11. depends
  12. depleted
  13. die
  14. eutrophication
  15. flood
  16. food
  17. forest
  18. grows
  19. growth
  20. increase
  21. lake
  22. large
  23. lead
  24. liter
  25. massive
  26. milligrams
  27. nitrogen
  28. nutrients
  29. oxygen
  30. phosphorus
  31. plants
  32. process
  33. providing
  34. rainstorm
  35. reduce
  36. resources
  37. sediment
  38. short
  39. sunlight
  40. supply
  41. surface
  42. surge
  43. surrounding
  44. time
  45. typically
  46. uninhabitable
  47. wash
  48. waters
  49. watershed
  50. zone