Invention of paper

[vc_row][vc_column width=”1/1″][vc_empty_space empty_h=”0″][vc_column_text][youtube]https://www.youtube.com/watch?v=COxB_GvdzWI[/youtube][/vc_column_text][vc_separator][vc_column_text]*Tutors – please transcribe your student’s answer to the questions. Give feedback and correct his/her answer once your student finishes his/her answer. Please do not stop your students while they’re talking and wait patiently until they finish their sentences unless they ask for help.[/vc_column_text][vc_separator][vc_column_text]*Use these templates: questions and answersvocabulary Go to File – Make a copy – You’ll get your own template – Share it with your student[/vc_column_text][vc_empty_space empty_h=”0″][vc_separator][vc_column_text]

Script

  00:07 This one here, and here… And here… 00:13 And… It’s done! IT’S DONE! 00:17 I have invented the time machine! 00:21 But do you know, one of mankind’s greatest inventions is probably lying around you right now? 00:28 That’s right my friend, PAPER! 00:32 This little thing is so abundant that it sometimes feels like a natural product. 00:38 But it isn’t quite so. 00:41 Ooooh oooh. Oh, no! There it goes… 00:47 Let’s trace this paper back to it’s roots. 00:50 Zoom in! 00:55 In ancient times, that is before the paper was invented,.. 01:00 ..people used to carry information not only in their brains… 01:05 But on them too! 01:08 Writing was usually done on bones, bamboo tablets or animal skin. 01:17 Which made accessing these writings, err…messy and tedious. 01:24 There was however, one Chinese man, in the Han Dynasty, in 105 AD.. 01:31 ..who revolutionized the way people wrote and read, forever! 01:36 The legend says, that a man named Cai Lun, once saw a wasp, knitting it’s nest. 01:43 It was then that an idea struck him. 01:48 He took the bamboo fibers.. 01:53 ..added them to water.. 01:55 ..and pounded them with a wooden tool. 01:58 After the fibers were thoroughly interwoven,.. 02:02 ..he poured the whole mixture on a flat woven cloth. 02:07 Letting the water drain out. 02:09 He let the wet mixture dry up in the sunlight. 02:13 And, Voila! 02:15 After a few hours, the world’s first paper was born. 02:24 Cai Lun, presented his paper making process to the Chinese Emperor. 02:29 And received praise for his ability. 02:32 From that time, paper has been in use everywhere. 02:37 And, is universally called the paper of Marquis Tshai. 02:44 It was easy to make, the writers were happy,.. 02:49 ..and of course, it was light weight. 02:53 Do you know, although the Chinese kept the secret of paper making,.. 02:57 ..discreet for a long time. 03:00 The secret eventually started spreading,.. 03:04 ..after the defeat of the Chinese T’ang army in 751 AD. 03:11 By the end of the 12th Century,.. 03:14 ..a major part of the world was using, Cai Lun’s method of manufacturing paper. 03:21 But as the popularity of this spectacular new invention grew,.. 03:26 ..so did the demand! 03:29 A demand that the manual method of paper manufacturing couldn’t certainly meet. 03:36 This eventually gave way to water-powered paper mills,.. 03:41 ..the first evidence of which.. 03:43 ..dates back to the Spanish Kingdom of Aragon in 1282 03:50 The most common fiber source the manufacturing process used.. 03:55 ..was from the rag picker! 03:58 Which included hemp, linen, and cotton. 04:03 Use of this fiber source was to continue for another 6 centuries.. 04:09 ..before another revolution! 04:15 Although this paper was cheaper than the traditional writing material.. 04:19 ..such as animal skin and bones. 04:22 The cost was still high and production was low. 04:27 Keeping it out of the reach of a common man. 04:32 But this was only until two men, from different continents.. 04:36 ..named Friedrich Gottlob Keller and Charles Fenerty.. 04:41 ..tried wood fibre as a source material. 04:45 In light of this new discovery,.. 04:47 ..the mills started replacing this new discovery to wood fiber. 04:52 And a new Era of papermaking began in mid 1844. 04:59 And by the end of the 19th Century, all the paper manufacturers in the West,.. 05:05 ..were converting wood to paper. 05:09 And, my friends, what is paper without pen and pencils. 05:14 Awww… It would be the same as me without you. 05:20 So, with the invention of fountain pen and pencils,.. 05:25 ..the paper industry skyrocketed! 05:30 Books were written and read. 05:33 Paper money was printed. 05:36 Even the gifts were wrapped in paper. 05:43 Sorry. 05:46 Sorry, sorry, sorry… 05:49 I said sorryyyy… 05:55 Don’t worry, we are safe now. 06:00 He was just a paper tiger. 06:03 So, what’s more? 06:05 Done… done… done. Oh, Yeah! 06:10 TRIVIA TIME! 06:12 Did you know, for every ton of paper that gets recycled.. 06:16 ..we save three cubic yards of landfill space.. 06:21 7000 gallons of water. 06:24 And, 20 trees. 06:28 It also produces 73% less air pollution.. 06:33 ..than making paper from new materials. 06:37 And, what’s more? The amount of energy saved from recycling.. 06:41 ..can power an average home for 6 months! 06:47 Global Toilet paper demand, uses nearly 30,000 trees, every day! 06:54 That is, 10 Million trees a year. 06:58 Almost half of global wood harvest, becomes paper! 07:03 Think about just how many trees we could save, if we all went paperless! 07:10 So, there you have it. 07:12 Some of the interesting things that I know about paper, and you should too! 07:19 I hope the next time you read or write something, it’s worth the paper it’s written on. 07:26 And remember friends, to tune in for the next episode. 07:31 This is me, zoooming out! 07:35 Hey kids, you liked my videos, didn’t you? 07:39 Before you go, don’t forget to click on the ‘Subscribe’ button and the bell. 07:44 So you won’t miss out on my latest videos. 07:49 See you. [/vc_column_text][vc_separator][vc_column_text]

Questions

  1. What are the causes of floods? (01:10)
  2. How many major categories of floods are there? (01:27)
  3. How long does a slow on-set flood last? (01:46)
  4. How long does a rapid on-set flood last? (01:53)
  5. How dangerous is a flash flood? (02:07)
  6. What can we do to help prevent floods? (02:38)
  7. Can floods occur in deserts? (02:58)
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