full transcript

From the Ted Talk by Angela Koine Flynn: The science of skin color

Unscramble the Blue Letters

But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV lhgit can damage skin, it also has an important parallel bineeft. UV helps our bedois produce vtaimin D, an ingredient that strengthens bnoes and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a ciotiodnn known as rektics.

Open Cloze

But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV _____ can damage skin, it also has an important parallel _______. UV helps our ______ produce _______ D, an ingredient that strengthens _____ and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a _________ known as _______.

Solution

  1. vitamin
  2. bodies
  3. benefit
  4. light
  5. bones
  6. condition
  7. rickets

Original Text

But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV light can damage skin, it also has an important parallel benefit. UV helps our bodies produce vitamin D, an ingredient that strengthens bones and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a condition known as rickets.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
uv light 3
ancestors migrated 2
skin color 2

Important Words

  1. absorb
  2. ancestors
  3. benefit
  4. bodies
  5. bones
  6. calcium
  7. condition
  8. damage
  9. direct
  10. earth
  11. experience
  12. fatigue
  13. helps
  14. humans
  15. important
  16. ingredient
  17. iron
  18. lets
  19. light
  20. magnesium
  21. migrated
  22. minerals
  23. north
  24. northward
  25. parallel
  26. phosphate
  27. problem
  28. produce
  29. rickets
  30. skin
  31. spreading
  32. strengthens
  33. sunshine
  34. traveled
  35. tropical
  36. uv
  37. vital
  38. vitamin
  39. weakened
  40. wide
  41. zinc
  42. zone