人教新目标(Go for it)版九年级全Unit 6 When was it invented? Section B 1a-1e课件（29张ppt）

When was it invented?
Unit 6 Section B 1a-1e
学习目标
通过分类、对比，能用crispy, salty, sour, sweet表达食物味道；通过同伴对话，能用When was ... invented？/ Where was ... invented? / Who invented...? / How was ... invented?等疑问句对食物发明的过程进行复述。
通过阅读题干已知信息，能够预测听力内容，听懂相关话题的简短对话，提高运用策略的意识。
通过与他人对话以及听写材料关键词，能善于观察身边食物，知道发明也可以从身边小事物开始。
Creative inventions
Creative inventions come from small things in life.
Free talk
What kind of food do you
like best？
How does it taste？
Classification of taste
sour
sweet
bitter
spicy
How do you describe the taste of this stuff?
crispy
/'kr?spi/
salty
/'s?lti/
Classification of taste
sour
sweet
bitter
spicy
crispy /'kr?spi/
salty /'s?lti/
What other foods can you name for each flavor？
Let’s connect
sweet
sour
crispy
salty
Do you think potato chips are an invention?
I think it's an invention.
Do you know how potato chips were invented?
I don’t know.
Look! What is this boy doing?
He is eating potato chips.
Let’s predict.
1. What are they talking about?
1. 根据图片预测听力内容，猜测文章大意。
2. 泛听文章大意。
2. When were potato chips invented?
3. Who invented potato chips?
Let’s listen and choose.
4. How were potato chips invented?
Because of the special needs of
customers.
B. Because George was angry.
C. Because they’re crispy and salty.
精听：对文章细节内容再次梳理 ——what, when, who, how。
1. What are they talking about?
A. How potato chips were invented.
B. Why George was angry.
C. When potato chips were invented.
2. When were potato chips invented?
A. In 1835.
B. In 1853.
C. In 1385.
3. Who invented potato chips?
A. A customer.
B. A restaurant.
C. A cook.
T F
T F
T F
T F
T F
T F
Let’s listen and choose.
1c
1. Potato chips were invented by mistake.
2. They were invented in 1863.
3. The customer thought the potatoes were not thin enough.
4. The customer said they were not salty enough.
5. George wanted to make the customer happy.
6. The customer was happy in the end.
Listen again and complete.
精听：利用思维导图引导学生建立对听力文本的整体思维，以及重点短语词组的记忆。
A: A customer _________ his plate of fried potatoes, because they were ____________. George cut the potatoes really, really ______. And he cooked them for ___________ until they were ________. He put lots of salt on them so they were really _______.
How did the potato chips taste?
Who invented potato chips?
When were potato chips invented?
Why were potato chips invented?
The History of Potato chips
Who
When
How
Who
Why
sent back
cut too thick
thin
a long time
crispy
salty
1d
George Crum
In 1853
Crispy and salty
———————
———————
———————
Let’s talk.
1e
Let’s retell the story.
How did the potato chips taste?
Who invented potato chips?
When were potato chips invented?
Why were potato chips invented?
The History of Potato chips
When
How
Who
Why
Model essay
Do you know how potato chips were invented?
Potato chips were invented by …
Let’s talk.
Do you know what these are?
How were they invented?
Let’s talk.
Who: Frank
Why: His soda-making tool was outside all night. The next day, the stick used to stir the soda and some spice[/spa?s/] water were frozen together
When: in 1905
What: popsicle
How: sweet, icy
popsicle
Model conversation
A: Did you know popsicles were invented by mistake?
B: Wow. I have no idea. When did it happen?
A: It was invented back in 1905.
B: Who invented popsicles?
A: They were invented by a boy named Frank.
B: Why were popsicles invented?
A: One day, Frank left his soda-making tool outside all night. The next day,
the stick used to stir the soda and some spice water were frozen together.
That was the first popsicle.
B: How did the popsicles taste?
A: It was icy and sweet.
Let’s discuss.
cookie
Who: a German baker
Why: A German baker fell in love with a beautiful girl named Koekje. Koekje liked roses and crispy cookies. He tried day and night to make a crispy biscuit with roses, and was deeply moved when the girl received the cookie.
When: in the 20th century
What: cookie
How: sweet, salty, crispy
Let’s discuss.
Tofu
Who: Liu An, king of Huainan in the Western Han Dynasty
Why: Liu An had been thinking how to live forever. When Liu An was making elixir, the soy milk was sprinkled on the plaster for forging elixir, the stone paste solidifies into tofu.
When: in Western Han Dynasty
What: Tofu
How: tasty, soft
Let’s discuss.
yogurt
Who: A farmer
Why: Sheep milk often goes bad during storage, which is caused by bacteria [b?k‘t?r??] contaminating污染 [k?n?t?m?ne?t??] the milk. But once the yeast 酵母[jist] in the air occasionally entered the goat’s milk, causing the goat’s milk to change and become more sour and sweeter.
When: before 3000 BC
What: yogurt
How: sour, sweet
Let’s discuss.
sandwich
Who: John Montagu
Why: He was a gambler and had no time to eat, so he came up with the idea of putting meat or vegetables between two slices of bread so that he wouldn’t get oil on his hands when he ate the meat, and he wouldn’t need a fork to put more effort into picking up the food, which would distract him from all his gambling.
When: in the18th century
What: sandwich
How: salty, juicy
Let’s check.
评价内容
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能用When was ... invented? / Where was ... invented? / Who invented ...? / How was ... invented?等疑问句对食物发明的过程进行复述。
能够阅读题干已知信息，使用关键词
预测听力内容，并能够听懂相关话题的简短对话。
能理解创意来源于生活。
mistake
Let’s study.
中
n: 错误，误会；v: 弄错，犯错
例
You have made a mistake.
拓
make a mistake出错
mistake...for...错把...当做...
by mistake 错误地
Let’s study.
练
别再犯如此愚蠢的错误了，否则你只能另谋高就了。
Don’t __________________________________,
or you will have to find another job.
[2013湖北黄石]
抱歉，我错拿了你的包。
Sorry, I took your bag ____ ________.
make such a silly mistake any more
by
mistake
Choose the correct answers.
1. Mom added salt to the soup, but it still wasn’t _____.
A. enough sweet B. sweet enough
C. salty enough D. enough salty
2. This kind of soup should be boiled _____ a long time.
A. for B. in C. with D. at
3. Hold on to your dreams, and they may come true _____.
A. at the end B. by the end
C. in the end D. on the end
4. I know that potato chips ______ by George Crum.
A. invented B. was invented
C. are invented D. were invented
One day in 1946, an American layman named Spencer was doing a radar-related experiment.
Suddenly, a colleague found something similar to blood in the pocket of Spencer's jacket, so he yelled: "Spencer, you are injured!" Spencer was also taken aback. After taking off his jacket, he realized that it was in his jacket pocket.
The piece of chocolate melted.
Most people might think that it was his body temperature that made the chocolate melt, but Spencer boldly proposed a more scientific idea after repeated thinking: it is the microwave invisible to the naked eye that works in the experiment.
So he began to verify his conjecture.
Spencer took a bag of popcorn kernels [?k??nlz](谷粒) , placed them near the magnetron [?m?ɡn?tr?n](磁控管), and a few minutes later, the lab was filled with the delicious smell of popcorn. The next day, Spencer brought in some raw eggs. He made a hole in a container, placed a raw egg in the container, and pointed the hole at the magnetron As a result, a curious colleague got too close and saw egg batter squirt all over his face through the hole. Spencer realized immediately: The heat inside the egg was obvious, and the pressure inside was causing the shell to crack.
And then, in 1947, Spencer developed the first microwave oven in the world. The first microwave oven on the market was about 1.8 meters high and 340 kilograms in weight, and it was put in a big hotel. And as technology developed, the microwave oven became smaller and became a real household appliance.