full transcript

From the Ted Talk by Francesco Sauro: Deep under the Earth's surface, discovering beauty and science

Unscramble the Blue Letters

Caves form in karstic roegnis. So karstic regions are areas of the world where the itlnrinaitfg water along cracks, fractures, can easily dissolve soluble lithologies, forming a drainage system of tunnels, conduits — a three-dimensional nwrtoek, actually. Karstic regions cover almost 20 percent of the continents' surface, and we know actually that speleologists in the last 50 years have explored roughly 30,000 kilometers of cave passages around the world, which is a big nemubr. But glsoeotigs have estimated that what is still missing, to be discovered and mapped, is something around 10 mloilin koelmreits.

Open Cloze

Caves form in karstic _______. So karstic regions are areas of the world where the ____________ water along cracks, fractures, can easily dissolve soluble lithologies, forming a drainage system of tunnels, conduits — a three-dimensional _______, actually. Karstic regions cover almost 20 percent of the continents' surface, and we know actually that speleologists in the last 50 years have explored roughly 30,000 kilometers of cave passages around the world, which is a big ______. But __________ have estimated that what is still missing, to be discovered and mapped, is something around 10 _______ __________.

Solution

  1. million
  2. geologists
  3. infiltrating
  4. number
  5. network
  6. kilometers
  7. regions

Original Text

Caves form in karstic regions. So karstic regions are areas of the world where the infiltrating water along cracks, fractures, can easily dissolve soluble lithologies, forming a drainage system of tunnels, conduits — a three-dimensional network, actually. Karstic regions cover almost 20 percent of the continents' surface, and we know actually that speleologists in the last 50 years have explored roughly 30,000 kilometers of cave passages around the world, which is a big number. But geologists have estimated that what is still missing, to be discovered and mapped, is something around 10 million kilometers.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
karstic regions 4
dark continent 2
cave exploration 2
cave explorer 2
cave passages 2
lost world 2
huge network 2
complete isolation 2

Important Words

  1. areas
  2. big
  3. cave
  4. caves
  5. conduits
  6. cover
  7. cracks
  8. discovered
  9. dissolve
  10. drainage
  11. easily
  12. estimated
  13. explored
  14. form
  15. forming
  16. fractures
  17. geologists
  18. infiltrating
  19. karstic
  20. kilometers
  21. lithologies
  22. mapped
  23. million
  24. missing
  25. network
  26. number
  27. passages
  28. percent
  29. regions
  30. roughly
  31. soluble
  32. speleologists
  33. surface
  34. system
  35. tunnels
  36. water
  37. world
  38. years