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1、Unit 9When was it invented?,Section B,Period 1 (1a 2c）,Period 2(3a 4b）,2a Listen and circle “T” (for true) or “F” (for false).,The potato chips were invented by mistake. 2. They were invented in 1863. The customer thought the potatoes werent thin enough. The customer said they werent salty enough. 5
2、. George wanted to make the customer happy. 6. The customer was happy in the end.,T FT FT FT FT FT F,_that potato chips were invented by mistake? Chips _by a chef called George Crum. They were invented in_. George Crum cooked them for a long time until they _And he sprinkled lots of salt on them so
3、they were_.,The history of potato chips,Did you know,were invented,1853,were crispy,really salty,3a. Read the article and write answers to the questions.,1. What is the article about?3. Who was it invented by?,2. When was it invented?,4. How was it invented?,Did you know that tea, the most popular d
4、rink in the world (after water), was invented by accident? Although tea wasnt brought to the Western world until 1610, this beverage was discovered over three thousand years before that. According to an Ancient Chinese legend, the emperor Shen Nong discovered tea when he was boiling drinking water o
5、ver an open fire.,Who invented tea?,Some leaves from a nearby bush fell into the water and remained there for some time. The emperor noticed that the leaves in the water produced a pleasant smell. Later he decided to taste the hot mixture. It was quite delicious. And in this way, one of the worlds f
6、avorite drinks was invented.,3a. Read the article and write answers to the questions.,What is the article about?3. Who was it invented by?,It is about the invention of tea.,It was invented over three thousand years ago.,2. When was it invented?,It was invented by the Chinese emperor Shen Nong.,It wa
7、s invented by accident.,4. How was it invented?,Write an article using the notes in the box.,3b,From pie plate to flying disk,The flying disk was invented by college students._ _ _ _ _,It is a new toy invented in the 1950s. They used a metal pie plate from a bakery in Bridgeport, Connecticut. Studen
8、ts ate the pies and then threw the pie plates. Today, there are flying disk clubs, magazines and a festival.,Self check: I dont like eating chocolate. It tastes too _ . Mom added salt but it still wasnt _ enough. I prefer lemons to oranges. I like the _ taste. She likes _ cookies. They are hard, dry
9、 and easily broken.,sweet,salty,sour,crispy,crispy sweet salty sour,Find out when these things were inventedand then write about them.,abacus,umbrella,camera,binoculars,bicycle,The abacus was invented in the sixth century by Chinese people.,The umbrella was invented about 4,000 years ago in Assyria, China and Egypt. The binoculars were invented in 1854 by Galileo Porro in Italy. The camera was invented in 1827 by Joseph Nicephore Niepce who took the first picture. The bicycle was invented in 1880s in England.,
