full transcript
"From the Ted Talk by Deepika Kurup: A young scientist's quest for clean water"

Unscramble the Blue Letters

So what exactly is this piooaactyhstls? Let's break it down: "photo" means from the sun, and a catalyst is something that spedes up a reaction. So what photocatalysis is doing is it's just speeding up this solar diocnetiifsn poesrcs. When sunlight comes in and strikes a photocatalyst, like TiO2, or titanium dioxide, it creates these really reactive oxygen species, like superoxides, hydrogen peroxide and hryxdyol radicals. These reactive oxygen species are able to remove bacteria and organics and a whole lot of contaminants from drinking water.

Open Cloze

So what exactly is this ______________? Let's break it down: "photo" means from the sun, and a catalyst is something that ______ up a reaction. So what photocatalysis is doing is it's just speeding up this solar ____________ _______. When sunlight comes in and strikes a photocatalyst, like TiO2, or titanium dioxide, it creates these really reactive oxygen species, like superoxides, hydrogen peroxide and ________ radicals. These reactive oxygen species are able to remove bacteria and organics and a whole lot of contaminants from drinking water.

Solution

  1. process
  2. photocatalysis
  3. hydroxyl
  4. speeds
  5. disinfection

Original Text

So what exactly is this photocatalysis? Let's break it down: "photo" means from the sun, and a catalyst is something that speeds up a reaction. So what photocatalysis is doing is it's just speeding up this solar disinfection process. When sunlight comes in and strikes a photocatalyst, like TiO2, or titanium dioxide, it creates these really reactive oxygen species, like superoxides, hydrogen peroxide and hydroxyl radicals. These reactive oxygen species are able to remove bacteria and organics and a whole lot of contaminants from drinking water.

ngrams of length 2

collocation frequency
clean water 5
water crisis 4
global water 4
uv radiation 3
titanium dioxide 3
plastic bottles 3
clear plastic 3

ngrams of length 3

collocation frequency
global water crisis 4
clear plastic bottles 3

Important Words

  1. bacteria
  2. break
  3. catalyst
  4. contaminants
  5. creates
  6. dioxide
  7. disinfection
  8. drinking
  9. hydrogen
  10. hydroxyl
  11. lot
  12. means
  13. organics
  14. oxygen
  15. peroxide
  16. photocatalysis
  17. photocatalyst
  18. process
  19. radicals
  20. reaction
  21. reactive
  22. remove
  23. solar
  24. species
  25. speeding
  26. speeds
  27. strikes
  28. sun
  29. sunlight
  30. superoxides
  31. titanium
  32. water