资源简介

Unit 3 The world of science
Developing ideas
学习目标：
1. To understanding the text and think about how true the story behind an invention may be.
2. To learn about the writing features and argumentation style of essays and help them form your own opinions and develop critical thinking.
3. To complete reading and writing activities so as to grasp the method of writing an experiment report.
重点难点：
1. To develop their reading comprehension of the essay and focus on how to develop the essay around the question title.
2. To think about how to express their arguments by listing supporting details or giving examples.
3. To write a report of the experiment according to the instructions for the experiment given.
课前诊断：
New words and expressions for Period Two.
1. draft v. 9. lightning n.
2. attach v. 10. experiment n.
3. conduct v. 11. declaration n.
4. scientific adj. 12. gravity n.
5. entirely adv. 13. account n.
6. metal n. 14. procedure n.
7. fiction n. 15. admittedly adv.
8. flash n. 16. establish v.
学习过程：
Step 1 Before reading
Activity 1
1. Have the students read the brief introduction to Benjamin Franklin and learn about him.
2. Have the students add more information about Benjamin Franklin to share with the class.
Step 2 While reading
Activity 2 Have the students read the passage quickly and answer the questions.
1. What did Franklin’s experiment aim to prove
2. What does the new study say about the story of Franklin’s experiment
3. Why does the author offer the story about the apple falling Newton’s head in the text
Activity 3
1. Read the text again and complete the exercise in Activity 3. Number the statements to show how people’s attitude towards Franklin’s experiment have changed.
a Franklin’s spirit of scientific exploration is still considered an inspiration.
b People are amazed at and inspired by Franklin’s experiment.
c Scientists questions what really happened in Franklin’s experiment.
2. Have the students think about the following questions and voice their opinion.
① How do you understand the statement “...we should not always believe everything we read or hear-even if it is a great story”
② What qualities do you think a great scientist should have
Step 3 Post reading
Activity 4 Work in groups. Have the students give a talk about their understanding of the saying “Seeing is believing.” The students complete the exercise step by step under the guidance of Activity 4.
The writing tip:
Make notes of writing main points Organize your talk step by step Give your talk to the class
The writing main points:
Your understanding of the saying Supporting details
Step 4 Before writing
Activity 5
Lead the students to read the instructions for the experiment and answer the questions.
The instructions for the experiment—Magic bottle
Materials
Procedure 1/2/3/4/5
Results ......
Note: Do the experiment under the instructions of a teacher
1. What will the results of this experiment be
2. What can you learn from this experiment
Step 5 Writing
Activity 6
1. Complete the boxes with the information in Activity 5.
Introduction Introduce the aim of the experiment.
Main body Describe the materials used in the experiment and explain the procedure.
Conclusion Report the results and what you have learned.
实践研究：
Activity 7
Share your report with the class.
This experiment is designed to
I prepare ... to do this experiment. Procedure:
After the experiment, I can draw the conclusion that
Step 6 Language appreciation
1. Franklin, along with many other scientists, has inspired us and taught us that scientific experiments are important in order to establish the truth and to contribute ...inventions.
[句式分析] 结构“Franklin, along with many other scientists”作主语时，谓语的人称与数要与 保持一致。“ in order to do sth” 意为 “ ”, 引导“ ”, “ and to contribute” 构成并列性目的状语。
[尝试翻译]
2. More than one account suggests that while Newton was certainly inspired by a falling apple, there is no proof that it hit him on the head.
[句式分析] More than one+单数名词，意为“ ”, 作主语时，谓语用“ ”； 句中“suggest”意为“表明”，引导宾语从句时，从句的谓语用“陈述语气”， 注意suggest表示“建议”引导从句的谓语用“虚拟语气（should +verb）”。 名词 “proof”后接that-clause为“ ”——同位语从句,指的是在复合句中充当同位语的从句，属于名词性从句的范畴，同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和同位语在逻辑上是主表关系。
[尝试翻译]
Step 7 Homework
1. Review new words and phrases learn in this period.
2. Polish your report of the experiment.
【参考答案】
学习过程：
Step 1 Before reading
Activity 1
1. Have the students read the brief introduction to Benjamin Franklin and learn about him.
2. Have the students add more information about Benjamin Franklin to share with the class.
Step 2 While reading
Activity 2 Have the students read the passage quickly and answer the questions.
1. His experiment aimed to test if lightning was really produced by electricity or something else.
2. New research suggests that the story may be fiction instead of fact.
3. He gives another example to demonstrate the argument of the passage that the stories behind inventions may not be true.
Activity 3
1. Read the text again and complete the exercise in Activity 3. Number the statements to show how people’s attitude towards Franklin’s experiment have changed.
1 People are amazed at and inspired by Franklin’s experiment.
2 Scientists questions what really happened in Franklin’s experiment.
3 Franklin’s spirit of scientific exploration is still considered an inspiration.
2. Have the students think about the following the questions and voice their opinion.
① I think the statement is right. From a scientific standpoint, people should stick to the facts and the facts should be proved by experiments and research. A good story is fiction which is often more interesting than the truth.
② As a great scientist, he or she should have more than one good quality, such as being smart, honest, objective, persistent, curious, imaginative etc.
Step 3 Post reading
Activity 4
Your understanding of the saying Supporting details
As the old Chinese saying goes, “What you hear about may be false, but what you see is true.” We often easily believe what we see or hear with doubt, but as a matter of fact, it is not always so convincing. New research suggests that the story of Franklin’s experiment may be fiction instead of fact.
Some scientists questions the story about apple that fell on Newton’s head and led him to come up with his theory of gravity. In fact, there is no proof that the apple hit him on the head.
Personally, we can not be content with what we see or hear. As the old saying goes, “Practice is the sole criterion for testing truth.” What we see or hear is true or false remains to be seen in the future. Please don’t hesitate to taste what you see or hear.
The writing tip:
Make notes of writing main points Organize your talk step by step Give your talk to the class
Step 4 Before writing
Activity 5
1. What will the results of this experiment be
2. What can you learn from this experiment
1. After the egg is sucked into the mouth of the bottle, it is slowly absorbed into the bottle and falls to the bottom.
2. Through this my own experience, I have learned that so long as we just study hard, observe and think carefully, we can figure out the secret of some scientific knowledge
Step 5 Writing
Activity 6
1. Complete the boxes with the information in Activity 5.
Introduction Introduce the aim of the experiment.
Main body Describe the materials used in the experiment and explain the procedure.
Conclusion Report the results and what you have learned.
实践研究：
Activity 7
This experiment is designed to figure out why the boiled egg is swallowed by the hot glass
I prepared such materials as a boiled egg, a glass bottle (bottle-neck a bit smaller than the egg) and hot water to do this experiment. Procedure: 1. Remove the shell of the egg. 2. Carefully pour some hot water into the bottle. 3. Shake the bottle gently. 4. Pour the hot water. 5. Quickly put the egg on top of the bottle.
After the experiment, I can draw the conclusion that it is true that a boiled egg can be swallowed by a hot glass bottle in the right experiment. Through this my own experience, I have learned that so long as we just study hard, observe and think carefully, we can figure out the secret of some scientific knowledge
Step 6 Language appreciation
1. Franklin, along with many other scientists, has inspired us and taught us that scientific experiments are important in order to establish the truth and to contribute ...inventions.
[句式分析] 结构“Franklin, along with many other scientists”作主语时，谓语的人称与数要与“with前面的部分”保持一致，“in order to do sth.”意为“为了······”, 引导“目的状语”, “and to contribute”构成并列性目的状语。
[尝试翻译] 富兰克林和许多其他科学家一起启发并教导我们，为了确认真相并有助于后来的科学发现与发明，科学实验是很重要的。
2. More than one account suggests that while Newton was certainly inspired by a falling apple, there is no proof that it hit him on the head.
[句式分析] More than one+单数名词，意为“不止一个······”, 作主语时，谓语用“第三人称单数形式”；句中“suggest”意为“表明”，引导宾语从句时，从句的谓语用“陈述语气”， 注意suggest表示“建议”引导从句的谓语用“虚拟语气（should+verb）”。名词 “proof”后接that-clause为“同位语从句”——同位语从句,指的是在复合句中充当同位语的从句，属于名词性从句的范畴，同位语从句用来对其前面的抽象名词进行解释说明，被解释说明的词和同位语在逻辑上是主表关系。
[尝试翻译] 不止一种说法表明，虽然牛顿肯定是受到了一个掉落的苹果的启发，但没有证据表明它击中了他的头部。Unit 3 The world of science
Starting out & Understanding ideas
学习目标：
1. To develop the interest in future inventions by watching the video and learn to talk about the influence of inventions on human.
2. To enhance the reading comprehension of the text and identity the interviewee’s opinions about the new age of invention.
3. To think about inspiration for inventions and cultivate a spirit of innovation.
重点难点：
1. To talk about how the way of our life inventions have changed and the reason behind these changes.
2. To master the skills of reading the interview and develop their reading comprehension.
3. Have students talk about what inspires people to invent things and future possible inventions.
课前诊断：
New words and expressions for Period Two.
1. press v. 9. battery n.
2. shoot v. 10. stuff n.
3. compute v. 11. desire n.
4. capable adj. 12. faint adj.
5. virtual adj. 13. virtual reality
6. flexible adj. 14. wearable tech
7. gunpowder n. 15. in addition
8. compass n. 16. never say never
学习过程：
Step 1 Starting out
Activity 1
Look at the four pictures with illustrations and talk about the imaginary inventions from famous novels.
the cloak of invisibility
The time machine
a virtual house of mirrors
video telephony
Activity 2
1. The students learn about some inventions by watching the video
2. The students talk about the invention which interests them most and give the reason.
Of all the inventions in the world, the computer is what I am the most interested in. The reason is that ...
Step 2 Before reading
Activity 1
The students compare the two pictures and discuss why the way we live has changed over time.
In the past
Nowadays
Step 3 First reading
Activity 2
Skim the text and find out the answers to the following the questions.
1. What inventions are not mentioned in the interview
A. the four great inventions in Ancient China.
B. The great Western inventions
C. computing technology and solar technology
D. space technology and medical technology
2. Which of the following statements is not true
A. Dr Richard think the present day is a new age for inventions.
B. Lots of new inventions are based on technologies.
C. Dr Richard is an inventor himself.
D. A strong desire to create things can make it a reality to invent things.
3. What kind of book do you think is the book The New Age of Invention
A. a travel guide B. a science fiction C. a self-biography D. a popular science book
Step 4 Further reading
Activity 3
The students tell the opinions from facts and choose the statements describing Dr Fairhurst’s opinions.
1. Inventions in Ancient China were better than those in the West.
2. A lot of today’s great inventions are tech-based.
3. Today, most inventors prefer working by themselves.
4. The desire to solve problems inspires invention.
5. A time machine will definitely be invented in the future.
Activity 4
Guide the students to comb the structure of the text and complete the mind map with information from the passage.
Inventions
Inventions in the past Ancient China—_______________________________ The West—___________________________________
Inventions of today Virtual reality / wearable tech 3. ________________________________ replacement 4.____________________made by 3D printers 5._______________using DPS, computing technology and 6. ___________________________________________
Inspiration for inventions Recognizing 7._________________________________ 8. ___________________________________________
实践研究：
Step 5 Post reading
1. Work in groups. Have the students think about what else inspires people to invent things.
2. Ask some students to share their opinions with the class.
Step 6 Language appreciation
1. It (the title of the book) suggests that the present day is a new age for inventions.
[句式分析] 本句中 “suggest ”意为“表明”引导的宾语从句 “that the present day is a new age for inventions.”, 从句用“陈述语气”。区别于suggest作“建议”时引导的从句用“虚拟语气”，从句谓语用“should +verb”.
[尝试翻译] 它(本书的标题)表明当今是发明创造的新时代。
2. So what is it that inspires us to invent things
[句式分析] 本句为“强调句”，其基本结构为“It’s + 被强调部分+ that+ ...”。(注意强调句中的连接词一般只用who（指人）或that（可指物，也可指人）。若被强调的是状语，也只能用that，而不能用when或者where。而且连接词不能省略.).本句中特殊疑问词what 代替了被强调部分，故形成“What is it that +... ”。
[尝试翻译] 那么，是什么激励我们去发明东西呢
Step 7 Homework
1. Review new words and phrases learn in this period.
2. Preview the contents to be learned in next lesson.
【参考答案】
Step 1 Starting out
Activity 1
Look at the four pictures with illustrations and talk about the imaginary inventions from famous novels.
the Cloak of Invisibility 隐形斗篷
The time machine 时间机器
a virtual house of mirrors 虚拟镜屋
video telephony 视频通话
Activity 2
1. The students learn about some inventions by watching the video
2. The students talk about the invention which interests them most and give the reason.
Of all the inventions in the world, the computer is what I am the most interested in. The reason is that computers can do kinds of work. They are already widely used in industries, science and other fields. With the help of powerful computers, great breakthroughs have been made in different aspects. Besides, in our daily life, many people do relaxing things such as playing computer games, listening to music and so on.
Step 2 Before reading
Activity 1
The students compare the two pictures and discuss why the way we live has changed over time.
In the past People lived a traditional and simple life. Much manual work is done by hand. Besides hard living conditions, students’ studying way is single and passive.
Nowadays Nowadays, Technology is one of the most important factors to promote our society to develop from one era to another. Whether you are aware of it or not, every day at every time technology is greatly influencing the way we live and puters, new technology in the 21th century, are the best examples. As the greatest inventions of human beings, they are being used more and more extensively in the world today. Especially when their functions are amplified with the help of internet, computers may even make everything convenient and possible.
Step 3 First reading
Activity 2
1—3 DCD
Step 4 Further reading
Activity 3
2/4
Activity 4
Inventions
Inventions in the past Ancient China—the four great inventions The West—the steam engine, the telephone, the radio
Inventions of today Virtual reality / wearable tech 3. flexible battery replacement 4. hearts and bone parts made by 3D printers 5. an intelligent walking house using DPS, computing technology and 6. solar technology
Inspiration for inventions recognizing 7. a problem needing a solution 8. an incredible desire to think and create, spirit of invention
实践研究：
Step 5 Post reading
I think that it’s very important to simulate people's interest in exploring science, As we all know, Interest is the best teacher. Also, one’s strong observation and imitation can make it possible for teenagers to create a good quality reproduction.Unit 3 The world of science
Using language
学习目标：
1. Review the usage and rules of the present perfect passive and correctly use in the real situations.
2. Accumulate English vocabulary describing careers in science.
3. Strengthen the listening ability to understand invention stories and enhance their oral expression ability.
4. Deepen the understanding of this unit topic, improve the ability to use integrated speech through the comprehensive training of skills.
重点难点：
1. To summarize the rules of the present perfect passive and correctly use it in different real situations.
2. To improve the listening ability to understanding invention stories.
3. To enhance the oral expression ability by telling the story behind an invention.
课前诊断：
New words and expressions for Period Two.
1. press v. 9. battery n.
2. shoot v. 10. stuff n.
3. compute v. 11. desire n.
4. capable adj. 12. faint adj.
5. virtual adj. 13. virtual reality
6. flexible adj. 14. wearable tech
7. gunpowder n. 15. in addition
8. compass n. 16. never say never
学习过程：
Step 1 Grammar learning—Present perfect passive
Activity 1 Definition and sentence patterns
1. Compare the following pairs of sentences and identify the basic sentence patterns of the present perfect and the present perfect passive.
a I guess someone has asked you about the title of your book before.
b I guess you have been asked about the title of your book before.
2. Review the definition of the present perfect tense and master the active and passive structures of the present perfect tense
Notes:
Present perfect active voice Subject + __________________________
Present perfect passive voice Subject + __________________________
3. The two structures above can be transformed with the same meaning.
Step 2 Practice
Activity 2
1. Rewrite the underlined sentences in the passage using the present perfect passive.
① It has already affected many things in our lives.
② Some restaurants in London have served 3D-printed hamburgers to customers.
③ The most significance success that people have achieved to date is in medicine.
④ They have made human body parts, including a beating heart, with 3D printing technology.
⑤ People have given a new 3D-printed shell to a turtle injured in a forest fire.
Activity 3
Look at the picture and describe what has happened to the police.
In the morning, when I went into my lab, I felt extremely surprised. What a mess it is now! My lab __________ (break) into. The only robot at the door __________ (push) down into pieces. The door of the cupboard was open. Some chemical apparatuses such as test glasses and tubes __________ (knock) over. In addition, my papers on the desk ________ (put) in disorder.
Step 3 Vocabulary
Activity 4
1. Have the students read the pictures and learn about words describing careers in science.
1. Guo Shoujing— 2. Charles Darwin— 3. Li Gaoyuan—
4. Marie Curie— 5. Marie Curie— 6. Chen Jingrun—
2. Lead the students to learn about the rules of word-building with the help of “Learning to learn”. pay attention to suffix such as -er/ -ist/ -ian.
Activity 5 and Activity 6
1. Fill in the blanks with the words in Activity 4.
2. Work in pairs. Talk about some careers in science which interests you most.
I’m interested in the work of a(n)...because...
Step 4 Before listening
1. Lead the students to read “Did You Know ” so that they show a great interest in invention story.
2. Give students some minutes to read the pictures in preparation of predicting the content of listening.
Step 5 While listening
Activity 7
1. Listen to the tape for the first time and understand the basic information of the conversation to number the pictures in the correct order. .
Picture a — Picture b — Picture c —
Picture d — Picture e —
2. Listen again and check the answer with the class.
Activity 8
1. Guide the students to further get more detailed information of the listening material after finishing Activity 7.
2. Focus on how the speakers describe the story behind an invention and take notes of key expressions to complete the exercise in Activity 8.
What is it It’s 1 ________________________________.
Who was it invented by It was invented by 2 _____________________ called Kenneth.
Who inspired the invention 3 _______________________________, who has Alzheimer’s.
How does it work 4 ___________________________ is sent to a mobile phone like an alarm when the person with it 5. _________________________.
实践研究：
Step 6 Post-listening
1. Work in pairs. Encourage the students to expand your thinking and create your own situations in which two students have a conversation about an invention story.
2. If time doesn’t permits, the students prepare for a story of a famous inventor for daily report next period.
Step 7 Language appreciation
1. It is not just humans who are benefiting—in Brazil, people have given a new 3D-printed shell to a turtle injured in a forest fire!
[句式分析] “It is not just humans who are benefiting”本句为“强调句”, 其基本结构为“ ”。(注意强调句中的连接词一般只用who（指人）或that（可指物，也可指人。）若被强调的是状语，也只能用that，而不能用when或者where。而且连接词不能省略。“injured in a forest fire”为过去分词短语作“后置定语”，修饰“a turtle”。
[尝试翻译] 。
2. His work on Chen’s Theorem made an important advance towards proving Goldbach’s Conjecture, the greatest unsolved problem in number theory.
[句式分析] “make an important advance towards...” 意为“ ”， “the greatest unsolved problem in number theory” 作“ ”解释 “Goldbach’s Conjecture”。 “unsolved ”意为 “ ”。
[尝试翻译] 。
Step 8 Homework
1. Review new words and phrases learnt in this period.
2. Consolidate the grammar item—the present perfect passive tense learned in this period.
【参考答案】
Step 1 Grammar learning—Present perfect passive
Activity 1 Definition and sentence patterns
1. Compare the following pairs of sentences and identify the basic sentence patterns of the present perfect and the present perfect passive.
a I guess someone has asked you about the title of your book before.
b I guess you have been asked about the title of your book before.
2. Review the definition of the present perfect tense and master the active and passive structures of the present perfect tense.
Notes:
Present perfect active voice Subject + have/has done+...
Present perfect passive voice Subject +have/has been done+...
3. The two structures above can be transformed with the same meaning.
Step 2 Practice
Activity 2
1. Rewrite the underlined sentences in the passage using the present perfect passive.
① Many things in our lives have already been affected by it.
② 3D-printed hamburgers have been served to customers in some restaurants of London.
③ The most significance success that has been achieved to date is medicine.
④ Human body parts, including a beating heart, have been made by them, with 3D printing technology.
⑤ A new 3D-printed shell has been given to a turtle injured in a forest fire.
Activity 3
Look at the picture and describe what has happened to the police.
In the morning, when I went into my lab, I felt extremely surprised. What a mess it is now! My lab has been broken (break) into. The only robot at the door has been pushed (push) down into pieces. The door of the cupboard was open. Some chemical apparatuses such as test glasses and tubes have been knocked (knock) over. In addition, my papers on the desk have been put (put) in disorder.
Step 3 Vocabulary
Activity 4
1. Have the students read the pictures and learn about words describing careers in science.
1. astronomer 2. biologist 3. geographer
4. physicist 5. chemist 6. mathematician
Activity 5 and Activity 6
1. Fill in the blanks with the words in Activity 4.
2. Work in pairs. Talk about some careers in science which interests you most.
I’m interested in the work of a doctor because the doctor is a great occupation. The doctors who are called “Angels in white” are always working for patient’s health. They can help patients cure, when we are ill, such as colds, headaches, stomachaches and so on. The doctor also can save the patient's life. I will look at some of the medical aspects of the book to prepare for the future.
Step 4 Before listening
1. Lead the students to read “Did You Know ” so that they show a great interest in invention story.
2. Give students some minutes to read the pictures in preparation of predicting the content of listening.
Step 7 Language appreciation
1. It is not just humans who are benefiting—in Brazil, people have given a new 3D-printed shell to a turtle injured in a forest fire!
[句式分析] “It is not just humans who are benefiting”本句为“强调句”, 其基本结构为“It’s + 被强调部分+ that+ ...”。(注意强调句中的连接词一般只用who（指人）或that（可指物，也可指人）。若被强调的是状语，也只能用that，而不能用when或者where。而且连接词不能省略.)。 “injured in a forest fire” 为过去分词短语作“后置定语”，修饰“a turtle ”。
[尝试翻译] 受益的不只是人类——在巴西，人们给一只在森林火灾中受伤的海龟一个新的3d打印外壳!
2. His work on Chen’s Theorem made an important advance towards proving Goldbach’s Conjecture, the greatest unsolved problem in number theory.
[句式分析] “make an important advance towards...” 意为“取得重要进展”， “the greatest unsolved problem in number theory” 作“同位语”解释 “Goldbach’s Conjecture”。 “unsolved”意为“未解决的”。
[尝试翻译] 陈氏（陈景润）定理的研究在证明哥德巴赫猜想方面取得了重要进展，哥德巴赫猜想是数论中最重要的未解问题。Unit 3 The world of science
Writing an experiment report
实验报告属于说明文，主要用来说明实验的目的，过程以及实验的结果。全文可以分为三个部分，首先说明实验的目的和实验所需要的实验器材；然后说明实验所采用的方法，实验具体过程以及实验所得到的结果；最后根据实验的情况得出相应的结论。
[基本框架]
1．开头(beginning)——交代实验的目的和所需器材
2．主体(body)——介绍实验方法、过程及结果
3．结尾(ending)——写出实验结论
[常用词块]
1．make good preparations for the experiment为实验做好充分准备
2．do the experiment as follows按照如下做实验
3．find a better way of doing it找到一个更好的方式来做
4．be under observation正在观察中
5．make a good study做好充分研究
[常用语句]
★精彩开头
1．We carry out the experiment to find out why it rusts.
我们做实验是为了发现它为什么会生锈。
2．The aim of the experiment is to find the cause of giving away the gas.
实验的目的是为了找到释放气体的原因。
3．With the purpose of discovering how it reacts with acid，we carry out the experiment.
为了发现它是怎么和酸发生反应的，我们进行了这次实验。
★丰满主体
1．Before we started，we prepared a candle，a glass，a basin and some water.
开始之前，我们准备了一支蜡烛，一个玻璃杯，一个盆子还有一些水。
2．The glass must be a little higher than the candle so that we can see the result more easily.
玻璃杯必须比蜡烛稍高一点儿，以便于我们能够更容易看清结果。
3．We were astonished to see that the water level in the glass was higher than that in the basin.
我们很吃惊地发现玻璃杯里的水位高于盆子的水位。
★余味结尾
1．We had an interesting experiment lesson.
我们上了一堂非常有意义的实验课。
2．We were greatly impressed with the process of burning.
我们对燃烧的过程印象非常深刻。
3．The experiment introduced us a useful way of exploring the unknown field.
这次实验为我们介绍了一种探索未知领域的有用的方式。
学以致用
请根据下列内容，写一篇短文，说明整个实验的内容。
实验目的：不打烂鸡蛋取走蛋壳。
实验器材：一个玻璃杯，一个小锅，水，一个鸡蛋，醋(vinegar)约250亳升
实验步骤：
1．把鸡蛋放在锅中煮十五分钟左右；
2．把煮熟的鸡蛋放到玻璃杯中；
3．往玻璃杯中倒醋，醋要漫过鸡蛋；
4．让鸡蛋在醋中浸泡24小时。
实验结果：24小时后，鸡蛋壳完全消失。
实验结论：醋中的酸性物质(acid)与蛋壳中的碳酸钙(calcium carbonate)反应生成二氧化碳(carbon dioxide)蛋壳(shell)消失。
注意：词数：80左右。
【参考范文】
The aim of the experiment is to move the shell from an egg without breaking the egg.To carry out the experiment, you need the following things: a glass，a small pot/boiler, some water, an egg and about 250 ml vinegar. When all these things are ready, you can begin the experiment.
First, boil the egg for about 15 minutes in a pot filled with water.Next, place the egg in the glass and cover it with vinegar.After that，leave the egg in vinegar for 24 hours.
24 hours later, you can see the shell disappear completely.The egg shell disappears because it is made up of calcium carbonate while the vinegar is an acid.The two substances react to form the gas, carbon dioxide.

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