外研版（2019）必修第三册Unit 3 The world of science Developing ideas 课件(共47张PPT，内镶嵌2视频)
文档属性
| 名称 | 外研版（2019）必修第三册Unit 3 The world of science Developing ideas 课件(共47张PPT，内镶嵌2视频) |
|
|
| 格式 | pptx | ||
| 文件大小 | 157.0MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-12-28 13:07:52 | ||
图片预览
文档简介
(共47张PPT)
Unit 3
The world of science
1
Learning Objectives
2
Developing ideas
3
Presenting ideas
4
Vocabulary
5
Homework
1
Learning
Objectives
语言能力
能读懂富兰克林风筝实验争议和实验报告类语篇，准确抓取科学探究的逻辑脉络，识别论据与论点的关联。
熟练运用单元核心词汇和现在完成时被动语态，准确描述科学现象、实验步骤及科技发展影响，规范撰写简短实验报告或科技预测文案。
能围绕 “科技变化预测”主题，结合日常生活，清晰阐述对未来 50 年科技发展的看法，回应他人质疑并补充观点。
思维品质
通过分析科学争议案例，学会质疑既定结论，从证据可靠性等角度评估科学观点，形成独立判断。
梳理科学发明的逻辑链，运用思维导图呈现科技发展脉络；结合生活痛点，提出简单的科技改进方案，体现科学探究精神。
辩证分析科技发展的双重影响，探讨科学技术与人类社会的关系，避免绝对化认知。
学习能力
能主动查阅科学领域相关资料，补充单元学习内容，运用“预测—验证—反思”方法深化对语篇的理解。
在小组讨论等活动中，有效分配任务、倾听他人观点，分工协作完成科技主题调研或实验方案设计，提升沟通与互助效率。
结合课堂反馈，反思自身在逻辑梳理等方面的不足，调整学习策略。
文化意识
了解中外科学发展史上的重要成就与科学家精神，认识不同文化背景下科学探索的共性与特色。
理解科学精神的核心内涵，尊重科学研究的过程与成果，树立热爱科学、崇尚理性的价值观。
能用英语简洁介绍中国本土科技成就，向他人传递中国科学文化，增强文化自信与跨文化沟通意识。
2
Developing ideas
watch the video
What does the video talk about
Watch the video and answer the following questions.
The video introduces a simple experiment called the “Paper Cup Flying Machine”. The experimental phenomenon is called the Magnus effect.
Do you know any other famous experiments Let's learn together!
Activity 1
Read the short introduction to Benjamin Franklin and share any other information you know about him.
Benjamin Franklin (1706–1790) was one of the Founding Fathers of the United States and helped draft the Declaration of Independence and the US Constitution. Apart from being a successful statesman, he was also well known as a leading American author, printer and publisher, successful diplomat, creative scientist and inventor.
本杰明·富兰克林（1706-1790）是美国的开国元勋之一，帮助起草了《独立宣言》和美国宪法。除了是一位成功的政治家，他也是一位著名的美国作家、印刷商和出版商、成功的外交官、富有创造力的科学家和发明家。
Learn more about Benjamin Franklin.
Activity 2
Read the passage and find out
what Franklin's experiment aimed
to prove.
It aimed to prove that lightning
was a form of electricity.
Structure of the passage.
Introduce the theme of the passage
Explain the theme in detail
Transition to another viewpoint to further explain the theme
Sum up
Match the main ideas with each paragraph.
Para.1 A. Questioning accepted ideas.
Para. 2 B. Benefits of the stories about exploring science.
Para. 3 C. Benjamin Franklin's famous experiment.
Para. 4 D. Facts should be proved by experiments and research
Para. 5 E. Introduction of the theme of the text.
Para. 6 F. Not everything about the experiment is true.
( ) People are amazed at and inspired by Franklin's experiment.
( ) Franklin's spirit of scientific exploration is still considered an inspiration.
( ) Scientists question what really happened in Franklin's experiment.
Activity 3
Number the statements to show how people's attitudes towards Franklin's experiment have changed.
1
2
3
Read the passage and choose the best answer.
1. What is the text mainly about
A. The story of Franklin's experiment is true or not.
B. The aim of Franklin's experiment.
C. The procedure of Franklin's experiment.
D. The effect of Franklin's experiment.
2. From the first two paragraphs, what do we know about the experiment
A. Only Franklin wanted to know the relationship between electricity and lightning.
B. Franklin taught many children about his findings in different schools.
C. People had already known the cause of lightning before Franklin's experiment.
D. As a scientist, Franklin was admired for his attitude to science.
3. What people are inspired by in Franklin's story
A. His bravery and scientific approach.
B. The kite with a key tied to the string.
C. The stormy weather with lightning.
D. His touching on the metal key.
4. What’s the author's attitude towards the story of Franklin's experiment
A. Doubtful B. Curious C. Objective D. Not mentioned
5. What was TRUE from Newton's story we know
A. The scientists didn't see the apple falling on Newton's head.
B. Scientists like to question everything around them.
C. Everyone can prove the apple really hit Newton on the head.
D. The falling apple inspired Newton to think deeply about why.
Summary
The information of Franklin's experiment
Experiment The kite lightning experiment
Aim
Material
Procedure
Conclusion
To test if lightning was really produced by electricity.
A kite with a string and a metal key
First, Franklin flew a kite with a string and a metal key.
Then, when a flash of lightning hit the kite, electricity was conducted through the string to the key.
Finally, touching the key, Franklin got an electric shock.
Lightning was a form of electricity.
Think and share
Do you think it matters that Franklin's experiment might not be true Why
No. Because what really matters lies in his bravery to do the experiment.
What is your opinion about the statement “…we should not always believe everything we read or hear - even if it is a great story”
Sometimes a really great story may not be true, and we need to have critical thinking.
Think and share
What qualities do you think a great scientist should have
I think a great scientist should be patient, serious, brave, careful, creative and imaginative…
In what ways do scientists contribute to society
Firstly, scientific discoveries promote the development of our society. Secondly, the contributions of scientists in medicine extend our life span. Thirdly, scientists have invented a lot of surprising tools that fundamentally improve our living standards.
Activity 4
Work in groups. Explain your understanding of the saying “Seeing is believing”, and then give a talk about it. You may use information in the passage as examples.
1 Make notes about your understanding of the saying and list supporting details.
Activity 4
Work in groups. Explain your understanding of the saying “Seeing is believing”, and then give a talk about it. You may use information in the passage as examples.
2 Organise your talk following the steps below.
Start your talk by explaining how you understand this saying.
Explain why you think this way. Use the notes you have made to support your ideas.
End your talk by summarising your points.
3 Give your talk to the class
Activity 5
Read the instructions for the experiment and answer the questions.
1 What do you think the results of this experiment will be
2 What can you learn from this experiment
The egg will squeeze into the bottle.
The experiment shows us the effects of air pressure. Air pressure indeed exists, and it is very powerful.
Activity 6
Complete the boxes with the information in Activity 5.
Do further research if necessary.
Introduce the aim of the experiment.
This experiment is designed to prove whether air pressure really exists.
Describe the materials used in the experiment and explain the procedure.
I prepared a boiled egg, a glass bottle (bottleneck a bit smaller than the egg) and hot water to do this experiment.
Activity 6
Complete the boxes with the information in Activity 5.
Do further research if necessary.
Procedure:
1. Remove the shell of the egg.
2. Carefully pour some hot water into the bottle.
3. Shake the bottle gently.
4. Pour out the hot water.
5. Quickly put the egg on top of the bottle.
After the experiment, I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
如何写实验报告
一、题型解读
一项实验的完成需要设计实验、做实验和写实验报告三步。
实验报告属于应用文。
句式以祈使句为主，时态以一般现在时为主。
二、写作攻略
1. 基本框架
（1）说明实验目的、介绍实验用品。
（2）介绍实验方法及步骤。
（3）写出实验结果和结论。
2. 写作特点
（1）写实验报告语言要简明扼要，句式要多用祈使句。
（2）要把实验步骤介绍具体、清楚，且实验步骤要齐全
3. 注意事项
（1）在介绍实验步骤时，要正确运用表示顺序的词，以清楚表达步骤和做法。
（2）从实验目的、实验用品、实验方法和步骤以及实验结果几方面逐条介绍。
三、模板素材
1. 常用句型
实验目的：aim, purpose, in order to, to find out
实验用品：apparatus(仪器), equipment, test tube, test tube holder, balance, liquid, solid, gas
实验步骤：process, firstly, secondly, lastly, heat, boil, fill, add... to..., measure, weigh
实验结果：result, conclusion, in a word, in conclusion
2. 常用句式
①Below is a description of a simple scientific experiment.
②It aims to show us...
③To find out if..., we carried out this experiment
④Leave the tube for one week
⑤Boil the water for three minutes.
⑥Put... at the bottom of the test tube
⑦Put two or three nails in the water.
⑧Add some oil to the water.
⑨This will keep air out of the water.
3. 写作模板
The aim: To find out .
Apparatus: .
Procedures:
1. Put in .
2. Put filled with into and then put into .
3. Observe when , and .
4. Observe the changes while .
The result:
.
The conclusion:
when and until .
Sample
The experiment is designed to prove whether air pressure really exists.
At the beginning of the experiment, I prepared the materials, including a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water. With all the things prepared, the experiment began.
First, I removed the shell of the egg. Then I carefully poured some hot water into the bottle, and shook the bottle gently. After a few minutes, I poured out the hot water. Just at the same time, I quickly placed the egg on top of the bottle. To my amazement, the egg squeezed into the bottle at once.
After the experiment, I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
Background information
Egg in a Bottle Experiment: Why does the egg get pushed inside the bottle
The answer is all about air pressure. If you first set the egg on an empty bottle, the air pressure inside the bottle matches the air pressure outside, so nothing happens. But when you pour some hot water into the bottle, it causes the air inside to heat up and expand rapidly, so some of the air in the bottle gets out. When the egg is put on the bottle, the air pressure outside of the bottle pushes the egg into the bottle. The result is an unbalanced force - the force of the air pushing on the egg from outside the bottle is greater than the force of the air pushing up on it from inside the bottle. As a result, the egg is pushed into the bottle.
3
Presenting ideas
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一：
1920 年代，电子管收音机
阶段二
1950 年代，晶体管收音机
阶段三
1970 年代，收录两用机
阶段四
1990 年代，便携式随身听收音机
阶段五
21 世纪，智能网络收音机
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一
1870 年代，贝尔发明的第一部电话
阶段二
1920 年代，旋转拨号电话
阶段三
1980 年代，大哥大移动电话
阶段四
2000 年代，翻盖手机
阶段五
2020 年代，全面屏智能手机
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一
1940 年代，电子管计算机（ENIAC）
阶段二：1960 年代，晶体管计算机
阶段三
1980 年代，个人计算机（PC）
阶段四：2000 年代，笔记本电脑
阶段五
2020 年代，折叠屏电脑
Activity 2
Choose one of the objects in Activity 1 or an object that you use every day. Predict how it will further change over the next 50 years. Make notes about your ideas.
My object:
___________________________________
How it will change:
___________________________________
Why it will change:
___________________________________
Activity 3
Present your ideas to the class. Use the notes in Activity 2 and the expressions in the box to help you.
Useful expressions
It will become...
People will use... instead of...
It will be... for people to...
There will be no... because...
4
Vocabulary
attach v. 系，绑；贴；连接；使附属；使隶属
例句：He attached the rope to the tree to prevent the boat from drifting away.
他把绳子系在树上，防止小船漂走。
You need to attach the printer to the computer via the USB cable.
你需要通过数据线把打印机连接到电脑上。
attach A to B 系，绑；贴；链接网络/设备
例句：She attached the key to her bag with a string. 她用绳子把钥匙系在包上。
be attached to sth/sb 使附属，使隶属；使依恋，情感
例句：This laboratory is attached to a famous medical university.
这个实验室隶属于一所著名医科大学。
attach importance/significance to sth 重视某事
例句：Parents always attach great importance to their children's education.
父母总是高度重视孩子的教育。
account n. 记述；描述；报道；账户 v. 说明；解释
例句：The old man gave a vivid account of his adventures during the war.
老人生动地描述了他在战争中的冒险经历。
The manager asked her to account for the increase in the project cost.
经理让她解释项目成本增加的原因。
take into account 考虑到；顾及（= take account of）
例句：We should take his youth into account. 我们该考虑到他还年轻。
on account of 由于；因为（= because of）
例句：He was late for the interview on account of heavy rain.
由于大雨，他面试迟到了。
account for 解释；说明（原因、数量）；占（比例）
例句：The expert tried to account for the sudden change in the stock market.
专家试图解释股市突然波动的原因。
by all accounts 据说；根据大家所说
例句：By all accounts, the new teacher is very patient with students.
据说这位新老师对学生非常有耐心。
on no account 绝不；无论如何都不（置于句首时句子倒装）
例句：On no account should we violate the school rules. 我们绝不能违反校规。
in account with 与…… 有账务往来
例句：Our company has been in account with this supplier for five years.
我们公司与这家供应商已有五年的账务往来。
origin n. 起源；起因
例句：Many English words are Latin in origin. 许多英语单词起源于拉丁语。
the origin of sth 某物的起源/起因
例句：The origin of paper-making in China dates back to the Han Dynasty.
中国造纸术的起源可追溯到汉朝。
original adj. 原始的；最初的；原创的
例句：This is the original manuscript of the novel. 这是这部小说的原始手稿。
originally adv. 最初；原本
例句：The building was originally a church. 这座建筑原本是一座教堂。
originality n. 独创性；创意
例句：The design of the product shows great originality.
这款产品的设计极具独创性。
declaration n. 声明，宣告
例句：The government made a declaration about strengthening environmental
protection. 政府发表了关于加强环境保护的声明。
declare v. 宣布；声明；宣告
例句：The mayor declared the festival open. 市长宣布节日开幕。
declarative adj. 陈述的；宣告的
例句：“She likes reading” is a declarative sentence.
“她喜欢阅读” 是一个陈述句。
declarer n. 声明者；宣告者
例句：The declarer of the policy refused to answer further questions.
该政策的宣告者拒绝回答更多问题。
conduct v. 传导（热、电）
例句：Metals can conduct electricity and heat well, so they are widely used in
industry. 金属能很好地导电导热，因此在工业中被广泛应用。
conduct 行为；举止；实施；进行
例句：His conduct in class was praised by the teacher.
他在课堂上的表现受到了老师的表扬。
conductor n. 导体；售票员；指挥家
例句：Silver is the best conductor of electricity. 银是最好的电导体。
conductive adj.导电的；导热的
例句：Graphite is a conductive material used in batteries.
石墨是一种用于电池的导电材料。
5
Homework
1. Complete the exercises at the end of the class.
2. Preview pages 49 to 53 of Unit 4.
See you in the next class!
Unit 3
The world of science
1
Learning Objectives
2
Developing ideas
3
Presenting ideas
4
Vocabulary
5
Homework
1
Learning
Objectives
语言能力
能读懂富兰克林风筝实验争议和实验报告类语篇，准确抓取科学探究的逻辑脉络，识别论据与论点的关联。
熟练运用单元核心词汇和现在完成时被动语态，准确描述科学现象、实验步骤及科技发展影响，规范撰写简短实验报告或科技预测文案。
能围绕 “科技变化预测”主题，结合日常生活，清晰阐述对未来 50 年科技发展的看法，回应他人质疑并补充观点。
思维品质
通过分析科学争议案例，学会质疑既定结论，从证据可靠性等角度评估科学观点，形成独立判断。
梳理科学发明的逻辑链，运用思维导图呈现科技发展脉络；结合生活痛点，提出简单的科技改进方案，体现科学探究精神。
辩证分析科技发展的双重影响，探讨科学技术与人类社会的关系，避免绝对化认知。
学习能力
能主动查阅科学领域相关资料，补充单元学习内容，运用“预测—验证—反思”方法深化对语篇的理解。
在小组讨论等活动中，有效分配任务、倾听他人观点，分工协作完成科技主题调研或实验方案设计，提升沟通与互助效率。
结合课堂反馈，反思自身在逻辑梳理等方面的不足，调整学习策略。
文化意识
了解中外科学发展史上的重要成就与科学家精神，认识不同文化背景下科学探索的共性与特色。
理解科学精神的核心内涵，尊重科学研究的过程与成果，树立热爱科学、崇尚理性的价值观。
能用英语简洁介绍中国本土科技成就，向他人传递中国科学文化，增强文化自信与跨文化沟通意识。
2
Developing ideas
watch the video
What does the video talk about
Watch the video and answer the following questions.
The video introduces a simple experiment called the “Paper Cup Flying Machine”. The experimental phenomenon is called the Magnus effect.
Do you know any other famous experiments Let's learn together!
Activity 1
Read the short introduction to Benjamin Franklin and share any other information you know about him.
Benjamin Franklin (1706–1790) was one of the Founding Fathers of the United States and helped draft the Declaration of Independence and the US Constitution. Apart from being a successful statesman, he was also well known as a leading American author, printer and publisher, successful diplomat, creative scientist and inventor.
本杰明·富兰克林（1706-1790）是美国的开国元勋之一，帮助起草了《独立宣言》和美国宪法。除了是一位成功的政治家，他也是一位著名的美国作家、印刷商和出版商、成功的外交官、富有创造力的科学家和发明家。
Learn more about Benjamin Franklin.
Activity 2
Read the passage and find out
what Franklin's experiment aimed
to prove.
It aimed to prove that lightning
was a form of electricity.
Structure of the passage.
Introduce the theme of the passage
Explain the theme in detail
Transition to another viewpoint to further explain the theme
Sum up
Match the main ideas with each paragraph.
Para.1 A. Questioning accepted ideas.
Para. 2 B. Benefits of the stories about exploring science.
Para. 3 C. Benjamin Franklin's famous experiment.
Para. 4 D. Facts should be proved by experiments and research
Para. 5 E. Introduction of the theme of the text.
Para. 6 F. Not everything about the experiment is true.
( ) People are amazed at and inspired by Franklin's experiment.
( ) Franklin's spirit of scientific exploration is still considered an inspiration.
( ) Scientists question what really happened in Franklin's experiment.
Activity 3
Number the statements to show how people's attitudes towards Franklin's experiment have changed.
1
2
3
Read the passage and choose the best answer.
1. What is the text mainly about
A. The story of Franklin's experiment is true or not.
B. The aim of Franklin's experiment.
C. The procedure of Franklin's experiment.
D. The effect of Franklin's experiment.
2. From the first two paragraphs, what do we know about the experiment
A. Only Franklin wanted to know the relationship between electricity and lightning.
B. Franklin taught many children about his findings in different schools.
C. People had already known the cause of lightning before Franklin's experiment.
D. As a scientist, Franklin was admired for his attitude to science.
3. What people are inspired by in Franklin's story
A. His bravery and scientific approach.
B. The kite with a key tied to the string.
C. The stormy weather with lightning.
D. His touching on the metal key.
4. What’s the author's attitude towards the story of Franklin's experiment
A. Doubtful B. Curious C. Objective D. Not mentioned
5. What was TRUE from Newton's story we know
A. The scientists didn't see the apple falling on Newton's head.
B. Scientists like to question everything around them.
C. Everyone can prove the apple really hit Newton on the head.
D. The falling apple inspired Newton to think deeply about why.
Summary
The information of Franklin's experiment
Experiment The kite lightning experiment
Aim
Material
Procedure
Conclusion
To test if lightning was really produced by electricity.
A kite with a string and a metal key
First, Franklin flew a kite with a string and a metal key.
Then, when a flash of lightning hit the kite, electricity was conducted through the string to the key.
Finally, touching the key, Franklin got an electric shock.
Lightning was a form of electricity.
Think and share
Do you think it matters that Franklin's experiment might not be true Why
No. Because what really matters lies in his bravery to do the experiment.
What is your opinion about the statement “…we should not always believe everything we read or hear - even if it is a great story”
Sometimes a really great story may not be true, and we need to have critical thinking.
Think and share
What qualities do you think a great scientist should have
I think a great scientist should be patient, serious, brave, careful, creative and imaginative…
In what ways do scientists contribute to society
Firstly, scientific discoveries promote the development of our society. Secondly, the contributions of scientists in medicine extend our life span. Thirdly, scientists have invented a lot of surprising tools that fundamentally improve our living standards.
Activity 4
Work in groups. Explain your understanding of the saying “Seeing is believing”, and then give a talk about it. You may use information in the passage as examples.
1 Make notes about your understanding of the saying and list supporting details.
Activity 4
Work in groups. Explain your understanding of the saying “Seeing is believing”, and then give a talk about it. You may use information in the passage as examples.
2 Organise your talk following the steps below.
Start your talk by explaining how you understand this saying.
Explain why you think this way. Use the notes you have made to support your ideas.
End your talk by summarising your points.
3 Give your talk to the class
Activity 5
Read the instructions for the experiment and answer the questions.
1 What do you think the results of this experiment will be
2 What can you learn from this experiment
The egg will squeeze into the bottle.
The experiment shows us the effects of air pressure. Air pressure indeed exists, and it is very powerful.
Activity 6
Complete the boxes with the information in Activity 5.
Do further research if necessary.
Introduce the aim of the experiment.
This experiment is designed to prove whether air pressure really exists.
Describe the materials used in the experiment and explain the procedure.
I prepared a boiled egg, a glass bottle (bottleneck a bit smaller than the egg) and hot water to do this experiment.
Activity 6
Complete the boxes with the information in Activity 5.
Do further research if necessary.
Procedure:
1. Remove the shell of the egg.
2. Carefully pour some hot water into the bottle.
3. Shake the bottle gently.
4. Pour out the hot water.
5. Quickly put the egg on top of the bottle.
After the experiment, I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
如何写实验报告
一、题型解读
一项实验的完成需要设计实验、做实验和写实验报告三步。
实验报告属于应用文。
句式以祈使句为主，时态以一般现在时为主。
二、写作攻略
1. 基本框架
（1）说明实验目的、介绍实验用品。
（2）介绍实验方法及步骤。
（3）写出实验结果和结论。
2. 写作特点
（1）写实验报告语言要简明扼要，句式要多用祈使句。
（2）要把实验步骤介绍具体、清楚，且实验步骤要齐全
3. 注意事项
（1）在介绍实验步骤时，要正确运用表示顺序的词，以清楚表达步骤和做法。
（2）从实验目的、实验用品、实验方法和步骤以及实验结果几方面逐条介绍。
三、模板素材
1. 常用句型
实验目的：aim, purpose, in order to, to find out
实验用品：apparatus(仪器), equipment, test tube, test tube holder, balance, liquid, solid, gas
实验步骤：process, firstly, secondly, lastly, heat, boil, fill, add... to..., measure, weigh
实验结果：result, conclusion, in a word, in conclusion
2. 常用句式
①Below is a description of a simple scientific experiment.
②It aims to show us...
③To find out if..., we carried out this experiment
④Leave the tube for one week
⑤Boil the water for three minutes.
⑥Put... at the bottom of the test tube
⑦Put two or three nails in the water.
⑧Add some oil to the water.
⑨This will keep air out of the water.
3. 写作模板
The aim: To find out .
Apparatus: .
Procedures:
1. Put in .
2. Put filled with into and then put into .
3. Observe when , and .
4. Observe the changes while .
The result:
.
The conclusion:
when and until .
Sample
The experiment is designed to prove whether air pressure really exists.
At the beginning of the experiment, I prepared the materials, including a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water. With all the things prepared, the experiment began.
First, I removed the shell of the egg. Then I carefully poured some hot water into the bottle, and shook the bottle gently. After a few minutes, I poured out the hot water. Just at the same time, I quickly placed the egg on top of the bottle. To my amazement, the egg squeezed into the bottle at once.
After the experiment, I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
Background information
Egg in a Bottle Experiment: Why does the egg get pushed inside the bottle
The answer is all about air pressure. If you first set the egg on an empty bottle, the air pressure inside the bottle matches the air pressure outside, so nothing happens. But when you pour some hot water into the bottle, it causes the air inside to heat up and expand rapidly, so some of the air in the bottle gets out. When the egg is put on the bottle, the air pressure outside of the bottle pushes the egg into the bottle. The result is an unbalanced force - the force of the air pushing on the egg from outside the bottle is greater than the force of the air pushing up on it from inside the bottle. As a result, the egg is pushed into the bottle.
3
Presenting ideas
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一：
1920 年代，电子管收音机
阶段二
1950 年代，晶体管收音机
阶段三
1970 年代，收录两用机
阶段四
1990 年代，便携式随身听收音机
阶段五
21 世纪，智能网络收音机
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一
1870 年代，贝尔发明的第一部电话
阶段二
1920 年代，旋转拨号电话
阶段三
1980 年代，大哥大移动电话
阶段四
2000 年代，翻盖手机
阶段五
2020 年代，全面屏智能手机
Activity 1
Work in groups. Look at the pictures and discuss how these objects have changed over the years.
阶段一
1940 年代，电子管计算机（ENIAC）
阶段二：1960 年代，晶体管计算机
阶段三
1980 年代，个人计算机（PC）
阶段四：2000 年代，笔记本电脑
阶段五
2020 年代，折叠屏电脑
Activity 2
Choose one of the objects in Activity 1 or an object that you use every day. Predict how it will further change over the next 50 years. Make notes about your ideas.
My object:
___________________________________
How it will change:
___________________________________
Why it will change:
___________________________________
Activity 3
Present your ideas to the class. Use the notes in Activity 2 and the expressions in the box to help you.
Useful expressions
It will become...
People will use... instead of...
It will be... for people to...
There will be no... because...
4
Vocabulary
attach v. 系，绑；贴；连接；使附属；使隶属
例句：He attached the rope to the tree to prevent the boat from drifting away.
他把绳子系在树上，防止小船漂走。
You need to attach the printer to the computer via the USB cable.
你需要通过数据线把打印机连接到电脑上。
attach A to B 系，绑；贴；链接网络/设备
例句：She attached the key to her bag with a string. 她用绳子把钥匙系在包上。
be attached to sth/sb 使附属，使隶属；使依恋，情感
例句：This laboratory is attached to a famous medical university.
这个实验室隶属于一所著名医科大学。
attach importance/significance to sth 重视某事
例句：Parents always attach great importance to their children's education.
父母总是高度重视孩子的教育。
account n. 记述；描述；报道；账户 v. 说明；解释
例句：The old man gave a vivid account of his adventures during the war.
老人生动地描述了他在战争中的冒险经历。
The manager asked her to account for the increase in the project cost.
经理让她解释项目成本增加的原因。
take into account 考虑到；顾及（= take account of）
例句：We should take his youth into account. 我们该考虑到他还年轻。
on account of 由于；因为（= because of）
例句：He was late for the interview on account of heavy rain.
由于大雨，他面试迟到了。
account for 解释；说明（原因、数量）；占（比例）
例句：The expert tried to account for the sudden change in the stock market.
专家试图解释股市突然波动的原因。
by all accounts 据说；根据大家所说
例句：By all accounts, the new teacher is very patient with students.
据说这位新老师对学生非常有耐心。
on no account 绝不；无论如何都不（置于句首时句子倒装）
例句：On no account should we violate the school rules. 我们绝不能违反校规。
in account with 与…… 有账务往来
例句：Our company has been in account with this supplier for five years.
我们公司与这家供应商已有五年的账务往来。
origin n. 起源；起因
例句：Many English words are Latin in origin. 许多英语单词起源于拉丁语。
the origin of sth 某物的起源/起因
例句：The origin of paper-making in China dates back to the Han Dynasty.
中国造纸术的起源可追溯到汉朝。
original adj. 原始的；最初的；原创的
例句：This is the original manuscript of the novel. 这是这部小说的原始手稿。
originally adv. 最初；原本
例句：The building was originally a church. 这座建筑原本是一座教堂。
originality n. 独创性；创意
例句：The design of the product shows great originality.
这款产品的设计极具独创性。
declaration n. 声明，宣告
例句：The government made a declaration about strengthening environmental
protection. 政府发表了关于加强环境保护的声明。
declare v. 宣布；声明；宣告
例句：The mayor declared the festival open. 市长宣布节日开幕。
declarative adj. 陈述的；宣告的
例句：“She likes reading” is a declarative sentence.
“她喜欢阅读” 是一个陈述句。
declarer n. 声明者；宣告者
例句：The declarer of the policy refused to answer further questions.
该政策的宣告者拒绝回答更多问题。
conduct v. 传导（热、电）
例句：Metals can conduct electricity and heat well, so they are widely used in
industry. 金属能很好地导电导热，因此在工业中被广泛应用。
conduct 行为；举止；实施；进行
例句：His conduct in class was praised by the teacher.
他在课堂上的表现受到了老师的表扬。
conductor n. 导体；售票员；指挥家
例句：Silver is the best conductor of electricity. 银是最好的电导体。
conductive adj.导电的；导热的
例句：Graphite is a conductive material used in batteries.
石墨是一种用于电池的导电材料。
5
Homework
1. Complete the exercises at the end of the class.
2. Preview pages 49 to 53 of Unit 4.
See you in the next class!