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(共32张PPT)
Unit 5
Great inventions
Lesson 4 Thank you，Mr Pasteur！
1. Lead in
2. New words
3. New lesson
6. Summary
4. Language points
5. Exercise
7. Homework
Contents
学习目标
能够读懂对话，理解“pasteurized”的含义与目的，回答关于概念解释、原因、人物贡献等问题；
01
能够在语境中理解并正确使用与“发明-过程-结果”相关的表达与词汇，并能用目标句型（it was invented by.../It was invented in.../It has made a great difference in.../changed our lives)简要说明发明信息；
02
能够围绕“发明如何改变生活”进行口头讨论，并在支架帮助下写一段介绍性短文，做到观点明确、信息完整、表达有条理。
03
通过本节课学习，学生能够：
Lead in
Read the passage and answer the questions.
A Do you drink milk every day？ Why？
B Do you know how the milk we drink is processed？
Yes， I do.Because it’s good for my health .
Yes ,I do./No ,I don’t.
New words
pasteurize/'pɑ st ra z/v.用巴氏杀菌法消毒
process/'pr ses/n.过程；流程 v.处理；加工
heat/hi t/v.加热；（使）变暖 n.热；温度
raw /r :/ adj. 未经加工的；生的
bacteria /b k't ri / n. 细菌
germ /d m/ n. 病菌；细菌；微生物
microbiologist / ma kr ba ' l d st/ n. 微生物学家
toast /t st/ n. 干杯；敬酒；烤面包片 v. 为……干杯；烤
dairy /'de ri/ n. 牛奶场；乳品店；乳制品 adj. 牛奶的；乳品业的
scientist /'sa nt st/ n. 科学家
Well, if something is pasteurized, it means that it has gone through a process of heating to a certain temperature.嗯，如果某样东西经过巴氏消毒，就意味着它经历了一个把它加热到一定温度的过程。
pasteurize v.用巴氏杀菌法消毒
process n.过程；流程 v.处理；加工
heat v.加热；（使）变暖 n.热；温度
Raw milk has dangerous bacteria and germs.生牛奶中含有有害的细菌和微生物。
raw adj. 未经加工的；生的
bacteria n. 细菌
germ n. 病菌；细菌；微生物
It was Louis Pasteur, a French microbiologist. He invented the process around 1864.是路易斯巴斯德，一位法国微生物学家。他在1864年前后发明了这一工艺。
microbiologist n. 微生物学家
Well, here's a toast to you, Mr Pasteur.好，那我敬你一杯，巴斯德先生。
toast n. 干杯；敬酒；烤面包片 v. 为……干杯；烤
New Lesson
While pouring a glass of milk, Jeremy notices something written on the package.
Jeremy: Hey, Mum! I just noticed a big word on the carton. PASTEURIZED. What does it mean
Mum: Well, if something is pasteurized, it means that it has gone through a process of heating to a certain temperature.
Jeremy: Why do we heat milk
Mum: Raw milk has dangerous bacteria and germs. We must heat milk to 72 degrees Celsius for 15 seconds to kill them.
Jeremy: How did people discover that
Mum: Many years ago, people sometimes got sick when they drank milk. Some of them even died because of the bad bacteria.
Jeremy: Wow! Who created this heating process A dairy farmer or a scientist
Mum: It was Louis Pasteur, a French microbiologist. He invented the process around 1864.
Jeremy: That's a long time ago!
Mum:(She nods and adds.) Mr Pasteur was one of the greatest scientists. His work saved millions of lives around the world. He was famous for his work on germs.
Jeremy:(He raises his glass of milk in the air.) Well, here's a toast to you, Mr Pasteur. Thank you for making the world much safer.
Read the passage and answer the questions.
A According to the passage,what does the word"PASTEURIZED"mean
B How did people know their milk needed to be heated
C How did Louis Pasteur's work make the world safer
If something is pasteurized, it means that it has gone through a process of heating to a certain temperature.
Many years ago, people sometimes got sick when they drank milk. Some of them even died because of the bad bacteria.
By heating milk to 72 degrees Celsius for 15 seconds to kill bacteria and germs.
Language points
Language points
1. While pouring a glass of milk, Jeremy notices something written on the package.杰里米在倒一杯牛奶时，注意到包装上写着一些东西。
pour/p :(r)/v.倒；下大雨
(1)此处指“倒，斟(饮料)”。
I've poured a cup of tea for you.我给你倒了一杯茶。
(2)[不及物动词](雨)倾盆而下；下大雨与pour down同义。
It's pouring outside.外面下着瓢泼大雨。
谚语 It never rains but it pours.不雨则已，一雨倾盆。/祸不单行。
拓展[动词]倾倒，倒出
pour... into...把...倒入...
pour... over...把...倒在...上面
Pour the oil into a frying pan and heat.把油倒入煎锅内加热。
Pour the sauce over the pasta.把酱汁浇在意大利面食上。
2. Well, if something is pasteurized, it means that it has gone through a process of heating to a certain temperature.嗯，如果某种东西经过了巴氏杀菌，意思是它经过了一道加热到特定温度的工序。
go through 经历
People with SAD(seasonal affective disorder) usually go through bad experiences such as low energy and sadness.患有SAD(季节性情感障碍)的人通常会经历一些不愉快的状况，比如精力不足和情绪低落。
They went through many hardships during the war.他们在战争期间历经千辛万苦。
拓展仔细察看；检查
I carefully opened the cookbook and went through it.我小心地打开食谱，仔细地看了一遍。
process /'pr ses/ n. 过程；流程 v. 处理；加工
(1)[名词]过程；流程
in the process of (doing) sth.在（做）某事的过程中
Her novel is in the process of being turned into a television series.她的小说正被拍成电视剧。
(2)[动词]加工；处理
Most of the food we buy is processed in some way.
我们买的大部分食品都用某种方法加工过。
Supercomputers can collect and process worldwide data very fast.超级计算机可以非常快速地收集和处理全球的数据。
heat /hi t/ v. 加热；（使）变暖 n. 热；温度
(1)[动词]加热；（使）变暖
heat up （使）变热；（使）变暖
I heated up the remains of last night's supper.
我把昨晚的剩饭热了一下。
The office will soon heat up.办公室很快就会热起来。
(2)[不可数名词]热
I can feel the heat of the sun on my back.我能感受到太阳照射在背上的热度。
(3)[名词]温度
Drop tangyuan into the boiling water, and cook on medium heat for 1 minute.将汤圆放入沸水中，用中火煮1分钟。
拓展 heat[名词]炉灶，炉火；暖气设备
Turn the heat down or it' ll burn.把火调小，否则会烧焦。
3. Many years ago, people sometimes got sick when they drank milk.许多年前，人们有时会因为喝牛奶而生病。
get sick生病
该短语中 get为系动词，后面跟形容词 sick作表语，表示动作，不能与表示一段时间的状语连用。而 be sick表示生病的状态，可与表示一段时间的状语连用。
The little boy got sick last Friday and so far he has been sick for five days.这个小男孩上周五生病了，到目前为止他已经病五天了。
4. Well, here's a toast to you, Mr Pasteur.好吧，敬你一杯，巴斯德先生。
[名词]干杯；敬酒
a toast to sb.敬某人，和某人干杯
I'd like to propose a toast to the bride and groom.我提议为新娘新郎干杯。
招展(1) toast[名词]烤面包片，吐司 I had a piece of toast for breakfast.我早饭吃了一片吐司。
(2) toast[动词]向······敬酒，为······干杯；烘，烤
They toasted the birth of their new baby with a big meal.他们用一顿大餐来为新生儿的降生举杯庆祝。
I toasted the cheese sandwiches.我烤了干酪三明治。
Exercise
Read the passage again and complete the paragraph with the correct forms of the words.
invent get solve heat kill
Pasteurization is a process that keeps milk safe from harmful bacteria by heating it.In the past, people sometimes ______ sick or even died after drinking milk. To_______ this problem, Pasteur _______ the process of pasteurization around 1864. He _____ the milk to 72 degrees Celsius and kept it at that temperature for 15 seconds. Harmful bacteria and germs in the milk __________, and the milk became safer to drink.
got
solve
invented
heated
were killed
Work in pairs. Discuss the following questions and take notes.
I think it’s paper.
Cai Lun invented paper in ancient China.
Paper made writing and recording information much easier and cheaper.And it helped spread knowledge.
Write a passage to introduce an invention.
Paper is one of the most important inventions in human history. It was invented by Cai Lun in the Eastern Han Dynasty.
Before paper was made, people recorded information on bamboo slips or silk, which were either heavy or expensive. Cai Lun improved the paper-making process,using materials like bark and rags.(树皮和破布)
Paper has made a great difference in our lives. It speeded up the spread of knowledge through books, newspapers and magazines.
1．The train ________ (go) through a long tunnel and arrived at the next station.
2．The ________ (die) of the little dog made the girl cry.
3．My brother wants to be a ________ (科学家) when he grows up.
went
death
scientist
句意：火车穿过一条长长的隧道，抵达了下一站。根据“arrived”可知，时态为一般过去时，go的过去式为went。故填went。
句意：那只小狗的死亡让这个女孩哭了起来。the后接名词，此处作主语，die的名词形式是death“死亡”，不可数名词。故填death。
句意：当我哥哥长大后，他想成为一名科学家。“科学家” 用可数名词scientist，位于“a”后，用单数名词作表语。故填scientist。
4．The teacher explained the ________ (过程) of experiment in class.
5．Please ________ (加热) the oil and add the onions.
6．He is a famous ________ (science) who has made great contributions to the study of insects.
process
heat
scientist
句意：老师在课堂上解释了实验的过程。process“过程”，名词，the process of experiment“实验过程”。故填process。
句意：请加热油并加入洋葱。加热：heat，动词；本句为祈使句，祈使句中动词用原形。故填heat。
句意：他是一位对昆虫研究有很大贡献的著名科学家。根据“He is a famous”可知，应该说他是科学家，scientist“科学家”，a接名词单数。故填scientist。
Summary
pasteurize v.用巴氏杀菌法消毒
process n.过程；流程 v.处理；加工
heat v.加热；（使）变暖 n.热；温度
raw adj. 未经加工的；生的
bacteria n. 细菌
germ n. 病菌；细菌；微生物
microbiologist n. 微生物学家
toast n. 干杯；敬酒；烤面包片 v. 为……干杯；烤
dairy n. 牛奶场；乳品店；乳制品 adj. 牛奶的；乳品业的
scientist n. 科学家
pour... into...把...倒入...
pour... over...把...倒在...上面
go through 经历
heat up （使）变热；（使）变暖
get sick生病
a toast to sb.敬某人，和某人干杯
Homework
THANK YOU WATCHING THIS ONE
基础作业：用合适的词语描述一种自己喜欢的发明创造；
进阶作业：创编一个对话来谈论最喜欢的发明创造。
拓展作业：采访你的家人或同学最喜欢的发明及原因并整理成汇报语篇。
Homework
Thank you
for listening!

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