full transcript

From the Ted Talk by Sangeeta Bhatia: This tiny particle could roam your body to find tumors

Unscramble the Blue Letters

It turns out that materials actually change their properties at the nanoscale. You take a common material like gold, and you grind it into dust, into gold nanoparticles, and it changes from looking gold to looking red. If you take a more etoxic mairaetl like cadmium selenide — forms a big, black crystal — if you make nanocrystals out of this material and you put it in a liquid, and you shine light on it, they glow. And they glow blue, green, yellow, orange, red, depending only on their size. It's wild! Can you ignmiae an object like that in the macro wrold? It would be like all the dienm jeans in your closet are all made of cttoon, but they are different clroos depending only on their size.

Open Cloze

It turns out that materials actually change their properties at the nanoscale. You take a common material like gold, and you grind it into dust, into gold nanoparticles, and it changes from looking gold to looking red. If you take a more ______ ________ like cadmium selenide — forms a big, black crystal — if you make nanocrystals out of this material and you put it in a liquid, and you shine light on it, they glow. And they glow blue, green, yellow, orange, red, depending only on their size. It's wild! Can you _______ an object like that in the macro _____? It would be like all the _____ jeans in your closet are all made of ______, but they are different ______ depending only on their size.

Solution

  1. colors
  2. denim
  3. imagine
  4. material
  5. world
  6. exotic
  7. cotton

Original Text

It turns out that materials actually change their properties at the nanoscale. You take a common material like gold, and you grind it into dust, into gold nanoparticles, and it changes from looking gold to looking red. If you take a more exotic material like cadmium selenide — forms a big, black crystal — if you make nanocrystals out of this material and you put it in a liquid, and you shine light on it, they glow. And they glow blue, green, yellow, orange, red, depending only on their size. It's wild! Can you imagine an object like that in the macro world? It would be like all the denim jeans in your closet are all made of cotton, but they are different colors depending only on their size.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
blood vessel 3
save lives 2
early detection 2
cancer cells 2
cancer detector 2

Important Words

  1. big
  2. black
  3. blue
  4. cadmium
  5. change
  6. closet
  7. colors
  8. common
  9. cotton
  10. crystal
  11. denim
  12. depending
  13. dust
  14. exotic
  15. forms
  16. glow
  17. gold
  18. green
  19. grind
  20. imagine
  21. jeans
  22. light
  23. liquid
  24. macro
  25. material
  26. materials
  27. nanocrystals
  28. nanoparticles
  29. nanoscale
  30. object
  31. orange
  32. properties
  33. put
  34. red
  35. selenide
  36. shine
  37. size
  38. turns
  39. world
  40. yellow