Unit 4 Amazing Science>>Topic 3 I don’t think aliens can be found in space.

Topic 3 I don’t think aliens can be found in space.
Section A
The main activities are 1a and 2a. 本课重点活动是1a和2a。
Ⅰ. Teaching aims and demands 教学目标
1. Learn a new word:
research
2. Learn some useful sentences:
(1) What fun!
(2) I won’t believe there are aliens until I see them with my own eyes.
3. Learn the use of modal verb+be+P.P.:
(1) We will be able to do anything that can be done on the earth.
(2) But I don’t think aliens can be found in space.
4. Talk about flying to Mars, the outer space and something about the aliens.
5. Learn to express possibility and impossibility.
Ⅱ. Teaching aids 教具
关键词卡片/图片/录音机/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:8分钟)
复习巩固本单元Topic 2中所学重点句型和语法，提高学生综合语言运用能力。
1. (复习巩固前面学过的有关现代科技及发明的重点句型，提高学生的口语表达能力。)
T: Boys and girls, we have learned something about spaceships, satellites, cloning, robots, GPS and so on. The new technologies and inventions have improved our life greatly. Could you say something about them
Ss: Yes.
T: OK. I made some cards with some key words on them. Each of you tries to say a sentence with the key words. Are you clear
Ss: Yes.
T: OK, begin!
(出示写有关键词的卡片。)
(1) proved, made great progress, developing, space industry
S1: They have proved that China has made great progress in developing its space industry.
(2) spaceships, controlled, computers
S2: Spaceships are mainly controlled by computers.
…
2. (复习一般过去时的被动语态，导入新课，并呈现生词research。)
(出示神五及嫦娥一号的图片。)
T: When was ShenzhouⅤ launched, S3
S3: It was launched in 2003.
T: When was Chang’eⅠ launched, S4
S4: It was launched in 2007.
T: Well done! They have proved that China has made great progress in developing its space industry. Is it right, S5
S5: That’s right. I’m sure we’ll send more spaceships into space.
T: Of course we can. Maybe people will fly to Mars one day. Do you think it is magical
Ss: Yes, that’s very exciting.
T: Do you want to be an astronaut like Yang Liwei
S6: Yes. I hope that I can travel to the moon one day.
…
T: Boys and girls, if you can be an astronaut in the future, you can do more research about space. But you should study hard now to make your dreams come true.
(板书并要求学生掌握。)
research
Step 2 Presentation 第二步 呈现(时间:12分钟)
呈现1a，完成1b。培养学生的听说技能和阅读理解能力。
1. (让学生听1a前讨论，以加深理解。)
T: Boys and girls, I will ask you two questions before listening. Please discuss them in two minutes.
(1) Do you think people will live on Mars in the future (2) Do you believe there are aliens in space
(两分钟后，播放1a录音,让学生带着问题听, 培养学生听力技能。)
T: OK. Let’s listen to the dialog and answer the questions on the small blackboard.
(出示小黑板。)
(1) What are they going to do this Saturday evening (2) What’s the movie about (3) What can people do on Mars in that movie
T: Boys and girls, can you answer the questions
(核对答案。)
2. (将学生分成两大组朗读1a，让学生画出关键词，再读一遍1a，完成1b。)
T: Open your books. Girls act as Maria. Boys act as Kangkang. Read the dialog. After reading, find out the key words and phrases in it. Read it again and finish 1b.
(板书)
movie, life in space, exciting, travel, visit, do you think, live in space, houses, schools, hospitals, be able to do, wait
(核对1b的答案。)
3. (让学生找出对话中的新语法modal verb + be + P.P.，教师进行讲解并操练。)
T: We have learned “is/am/are+P.P.” and “was/were+P.P.” Please find out sentences with modal verb + be + P.P.
(教师板书并解释带有情态动词的被动语态结构。)
We will be able to do anything that can be done on the earth.modal verb+be+P.P.
(教师强调带有情态动词的被动语态结构并操练。)
T: Boys and girls, I’ll say a sentence in the active voice. You change it into the passive voice, OK
Ss: OK.
T: We should clean our classroom every day.
Ss: Our classroom should be cleaned by us every day.
T: We must finish our homework on time.
Ss: Our homework must be finished on time.
T: I may put my book in your bag.
Ss: My book may be put in your bag.
T: Excellent. You did a good job.
Step 3 Consolidation 第三步 巩固(时间:9分钟)
巩固1a，呈现并完成2a和2b。进一步培养学生的听说技能和阅读理解能力。
1. (让学生表演1a。)
T: Boys and girls, can you act out the dialog
Ss: Yes.
(学生表演后，教师给予鼓励。)
2. (放2a录音，让学生带着问题去听。)
T: We know Maria and Kangkang saw a wonderful movie about life in space. After seeing the movie, what are they talking about Now let’s listen to the tape and answer the questions on the small blackboard.
(出示小黑板。解释生词并要求学生理解。)
(1) What are they talking about (2) How about the scientific research on aliens in America
(核对答案。)
(板书并要求学生理解。)
scientific
3. (分组朗读2a，完成2b。)
T: Boys act as Kangkang. Girls act as Maria. Please read the dialog aloud. After reading, please finish 2b.
(核对答案。)
4. (让学生再读对话，找出文中的难点，老师进行讲解。)
T: Please read 2a again. Then try to find out the difficulties.
(板书并讲解。)
(1) I don’t think aliens can be found in space.(2) I won’t believe there are aliens until I see them with my own eyes.
(核对2b问题的答案)
Step 4 Practice 第四步 练习(时间:11分钟)
巩固1a，2a，完成3。通过表演、复述等形式，让学生进一步巩固对1a和2a的理解，加强学生综合语言运用能力。
1. (根据1a和2a，安排学生两人一组对话，准备两分钟，之后请至少3组同学表演。)
T: Boys and girls, Dialog 1a and Dialog 2a can be acted out together. Now please prepare for two minutes, then act them out in pairs.
(学生表演完，教师给予鼓励。)
2. (教师提供对话中的关键词，让学生完成复述任务。)
T: Now, I say the key words in the two dialogs. Can you retell the dialogs
Ss: Let’s have a try.
T: A wonderful movie.
Ss: There will be a wonderful movie this Saturday evening.
T: Life in space.
Ss: It’s a movie about life in space.
T: Travel by spaceship.
Ss: All the people travel by spaceship in the movie.
T: Live in space.
Ss: Kangkang thinks they will live in space one day.
T: Houses, schools, hospitals.
Ss: There will be houses, schools, hospitals and so on.
T: Be able to.
Ss: We will be able to do anything that can be done on the earth.
T: Aliens.
Ss: Kangkang doesn’t believe there are aliens.
T: Scientists.
Ss: Some scientists think there are aliens. One American scientist thinks they have already been on the earth.
T: In order to.
Ss: They are reading on the Internet in order to learn about human culture.
T: Won’t … until.
Ss: Maria won’t believe there are aliens until she sees them with her own eyes.
T: Great. You did very well. After class you should recite the two dialogs. OK
Ss: OK.
3. (让学生完成3，初步掌握含有情态动词的被动语态的用法。)
T: Boys and girls, finish 3. Match the two columns to make sentences. Pay attention to the new grammar “modal verb + be + P.P.”
(核对答案。)
4. (用适当的词完成下列句子。)
(1) The letter yesterday. 信是昨天写的。
(2) The book into many languages since it was published. 这本书出版后被翻译成多种语言。
(3) This work at once. 这项工作必须立即完成。
(4) This book into many foreign languages. 这本书应该译成多国文字。
(核对答案。)
(1) was written (2) has been translated (3) must be done (4) should be translated
Step 5 Project 第五步 综合探究活动(时间:5分钟)
让学生写观后感，并搜集更多有关外星人和火星的知识，巩固本节课所学内容，并为下节课的学习做好铺垫。
1. Work in groups. Collect information about aliens and Mars. Share it in groups to get ready for the next section. You can begin your project by asking“How much do you know about aliens/Mars ”
2. Homework.
(1) Recite 1a and 2a.
(2) Suppose you are Maria. Please write another diary after watching the movie about aliens.
板书设计：
I don’t think aliens can be found in space.Section Asee sb./sth. with one’s own eyesmodal verb + be + past participleWe will be able to do anything that can be done on the earth.But I don’t think aliens can be found in space.
Section B
The main activities are 1a and 3. 本课重点活动是1a和3。
Ⅰ. Teaching aims and demands 教学目标
1. Learn some new words and a phrase:
basic, coach, be based on
2. Learn a useful sentence:
Sometimes I want to be a dancer, but I think I’m going to be a scientist in the future.
3. Consolidate the use of modal verb+be+P.P.:
(1) I believe more and more things will be discovered in the future.
(2) The watch should be repaired first.
(3) The trees should be watered at once.
4. Talk about flying to Mars and the outer space.
Ⅱ. Teaching aids 教具
录音机/小黑板/磁带
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:10分钟)
复习含有情态动词的被动语态，并呈现部分生词，导入新课。
1. (以男、女两组竞赛的方式复习含有情态动词的被动语态。由教师说出一个动词，同学们用这个动词去造一个含有情态动词的被动语态的句子。看哪组说得又快又准确。)
T: OK. Let’s have a competition between boys and girls. I say a verb, and you make a sentence with this verb. You must use “modal verb+be+past participle”. Do you understand
Ss: Yes.
T: For example. I say“water”. You should say it like this:“The flowers must be watered every day. ”OK, let’s begin. Protect.
Girls: Our environment should be protected well.
T: Clean.
Boys: The blackboard must be cleaned after class.
T: Look after well.
Girls: The young trees should be looked after well.
T: Speak.
Girls: English should be spoken in our English class.
T: Plant.
Boys: More and more trees should be planted.
T: Invent.
Girls: Many useful things will be invented in the future.
T: Excellent. You did very well. Girls did better than boys. Congratulations! (鼓掌。)
2. (提问关于太空和人类对太空研究的一些问题。加深对含有情态动词的被动语态结构的变化及用法的认识，导入并呈现部分生词。)
T: What movie did Kangkang and Maria watch that day
S1: They watched a movie about the life in space.
T: Does Kangkang believe there are aliens
S2: No, he doesn’t believe it.
T: And you Do you believe there are aliens
S3: No, I don’t believe it, because they haven’t been seen in our daily life.
(很有可能出现不同意见，那样就更有利于进一步复习提问。)
S4: Mr./Miss…, I believe there are aliens because there are a large number of stars in space. There must be a star like our planet.
T: I agree with you. We all wonder if there are aliens in space, but what can be done to find out whether there are aliens in space or not
S5: Satellites and spaceships should be sent up.
S6: Other planets may be visited.
S7: More scientific research should be done.
T: Good idea. If people do more scientific research, I believe more and more unknown things will be discovered in the future. I really admire the astronauts. They can travel to space and discover something new about planets. To tell you the truth, when I was a child, I wanted to be an astronaut. What are you going to be when you grow up
S8: I’d like to be a scientist.
T: So you need to learn a lot of knowledge and master some basic computer skills. What are you going to be in the future, S9
S9: I want to be a basketball player in NBA.
T: So you need a good coach and more training. S10, what about you
S10: I’d like to be a football coach and help our national team make great progress.
T: Very good. I’m glad to hear that you all have good dreams. I hope your dreams will come true. Now, let’s see what Maria and Kangkang want to be when they grow up.
(板书，讲解并要求掌握basic和coach；理解admire。)
admirebasiccoach
Step 2 Presentation 第二步 呈现(时间:10分钟)
呈现1a。培养学生的听说技能。
1. (让学生听1a录音，然后回答问题。)
T: Listen carefully and find out the answers to the two questions on the small blackboard:
(出示小黑板。)
(1) What is Kangkang going to be when he grows up (2) What about Maria
(核对答案。)
2. (让学生分组朗读, 女孩读Maria, 男孩读Kangkang。读后让学生自己设计问题，并互相问答。)
T: Read the dialog in groups. Girls act as Maria. Boys act as Kangkang. After reading, talk about it by asking and answering questions in pairs.
(读后，给学生三分钟时间准备。)
S1: Has Maria heard the news about the space flight to Mars
S2: No, she hasn’t.
S3: Who will take part in the space flight
S4: The astronauts from China, the United States and Russia.
S5: Why will the astronauts travel to space
S6: They want to discover something new about Mars.
S7: What is Kangkang going to be when he grows up
S8: He wants to be an astronaut.
S9: Which subject does Maria prefer
S10: She prefers science to dance.
S11: So what is Maria’s dream
S12: She wants to be a scientist in the future.
…
(学生回答问题时，教师记录下1a中的关键词并板书。)
news, take part in, astronauts, travel, admire, grow, cool, basic, dancer, perform, prefer, favorite, believe, come true
Step 3 Consolidation 第三步 巩固(时间:10分钟)
巩固1a，完成1b。进一步培养学生的阅读理解能力及综合语言运用能力。
1. (让学生一起朗读1a对话，然后根据对话中的关键词进行表演。活跃课堂气氛，熟悉对话内容。)
T: Now read the dialog between Kangkang and Maria. Then act it out with the help of the key words and phrases.
(学生可以练习两遍。)
T: Who can perform the dialog in front of the class
(让两组学生上台表演，点评鼓励。)
2. (让学生完成1b。)
T: Complete the sentences in 1b according to 1a. Pay attention to the grammar “modal verb+be+P.P.”
(学生做完后核对答案。)
Step 4 Practice 第四步 练习(时间:10分钟)
完成2和3。进一步培养学生的听说技能和阅读技能。
1. (播放2录音，让学生完成2。)
T: Let’s listen to the conversations and put the problems in the correct order. Then listen again and complete the sentences.
(学生做完后，师生一起核对答案。)
2. (播放《时间机器》的主题曲，导入3。)
T: Boys and girls, is this piece of music beautiful
Ss: Yes.
T: I like it very much. It is from the film “The Time Machine”. The film is based on a science fiction.
(板书并要求学生掌握be based on，理解base和science fiction。)
base be based onscience fiction
T: I like watching the science fiction movies. I think they are very exciting and interesting. Do you think so
Ss: Yes. We all like watching them.
T: OK, let’s look at 3. Here are three famous movies. The first one is the film I just mentioned. Now, please read 3 carefully and try to understand them. Five minutes later, you will be asked to retell the three stories with your own words.
(五分钟后。)
T: Have you finished yet
Ss: Yes.
T: Who is the volunteer to say something about “The Time Machine”
S1: Let me have a try. …
T: The second one
S2: …
T: The third one
S3: …
T: Excellent. You did a good job! If Michael is interested in aliens, which one should he choose, S4
S4: E.T.
T: Right! Now let’s discuss in groups and list more science fiction movies.
(小组讨论，完成3。)
Step 5 Project 第五步 综合探究活动(时间:5分钟)
让学生对本单元的话题和语言知识进行综合探究活动，激励学生树立远大理想，打下扎实基础，努力实现人生价值。
1. (教师引导学生根据本单元的话题和语言知识，收集关于太空的信息，并互相交流。)
T: We have known that China will take part in the space flight to Mars. The space industry has become the focus of our society. What have we done to study the universe Say something you know.
S1: Shenzhou V was sent into space in 2003. Yang Liwei was the first astronaut to travel in spaceship in China.
S2: Fei Junlong and Nie Haisheng traveled in Shenzhou VI in 2005.
S3: China sent up the first lunar probe—Chang’eⅠ.
…
T: Thank you for telling me so much about it. Please look for more information on the Internet or in the books about space. Write it down on a piece of paper. Then we can exchange information with each other.
2. Homework:
Write a passage about dreams.
板书设计：
I don’t think aliens can be found in space.Section Bbe based onscience fictionSometimes I want to be a dancer, but I think I’m going to be a scientist in the future.I believe more and more things will be discovered in the future.
Section C
The main activity is 1a. 本课重点活动是1a。
Ⅰ. Teaching aims and demands 教学目标
1. Learn a new words:
storm
2. Learn some useful sentences:
(1) Its diameter is 53% as wide as that of the earth.
(2) It has been two days since we landed on Mars.
(3) It is six weeks since we had a proper shower.
3. Learn something more about Mars.
Ⅱ. Teaching aids 教具
火星和罗马战神的图片/录音机/幻灯片/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:3分钟)
师生共同谈论理想，并探讨火星等太空知识，导入新课。
T: Morning, boys and girls!
Ss: Good morning, sir/madam!
T: What are you going to be when you grow up, S1
S1: I’d like to be a teacher.
T: Good job! What about you, S2
S2: I want to be an astronaut. I can travel to space by spaceship and discover something new about space.
T: What a great dream! Our country has launched three manned spaceships. In 2007, we sent up our country’s first lunar probe. In the future, the astronauts from China will fly to Mars to explore it. They will discover something new about it. Do you know anything about Mars
Ss: No.
T: OK, let’s learn it from Section C.
Step 2 Presentation 第二步 呈现(时间:15分钟)
利用图片，导入生词学习，然后设置听力问题，提高学生的听力，最后，让学生研读1a，引导学生发现文中疑难点并互相讨论解决，教师做补充讲解。
1. (出示火星及罗马战神的图片，简单介绍火星，呈现部分生词。)
T: (指着火星图片。) This is a picture of Mars. It is the fourth planet from the sun in the solar system. It is named after Mars, the Roman god of war. It is much smaller than the earth. Its diameter is 53% of the earth’s.
(板书并要求学生理解solar，了解Roman, diameter。)
solar Romandiameter
T: During spring and summer, strong storms can cover the whole surface of Mars. The gravity on its surface is about 40% as strong as it is on earth.
(板书并要求学生掌握storm，了解gravity。)
stormgravity
T: Do you want to know something more about Mars
Ss: Yes.
T: OK, please listen to 1a to grasp the main idea of the text.
2. (设置听力任务，让学生带着问题听1a录音，提高学生的听力。)
(用幻灯片出示听力任务。)
(1) What does Mars look like (2) How far is Mars from the sun (3) What’s the temperature on Mars
(核对答案。)
3. (让学生精读1a，找出文中的疑难点，提高学生的阅读能力。)
T: Boys and girls, please read 1a carefully. Find out the difficulties and important expressions.
(板书学生提出的疑难点，先让学生互相讨论解决，之后教师分析并讲解。)
It’s reported that...At a distance of
Step 3 Consolidation 第三步 巩固(时间:10分钟)
通过复述及完成短文填空的方式，巩固1a。
1. (让学生再读1a，完成1b。)
T: Read 1a again and finish 1b。
(核对答案。)
2. (让学生根据关键词复述1a，加深理解，提高表达能力。)
T: Please retell the passage according to the key words on the blackboard. I will say the key words. You say sentences together, OK
Ss: OK.
(板书关键词及短语。)
Mars, fourth, named, diameter, a distance of, tell, because, bright red, ball, storms, gravity, temperature, oxygen, eight months, closest, searching for
T: Mars and fourth.
Ss: Mars is the fourth planet from the sun in our solar system.
T: Named.
Ss: It is named after Mars, the Roman god of war.
…
3. (出示幻灯片，完成对火星的介绍，巩固1a内容。最后核对答案。)
Mars, the planet of the solar system, goes around the sun at a of about 228 million kilometers. Its is 53% as wide as that of the earth. It looks like a and ball. It’s very beautiful. But during and , strong can cover the whole of Mars. The gravity on the surface of it is about as as it is on earth.
Step 4 Practice 第四步 练习(时间:12分钟)
小组活动。根据1c的问题，展开讨论，组成对话，然后导入并学习2。
1. (两人一组讨论1c中的问题，并安排两三组学生汇报。培养学生自主学习和创新能力。)
T: We learned a lot from 1a about Mars just now. Please discuss the following questions with your partner. Then make conversations in pairs. After that I’ll ask two or three pairs to report in front of the class.
(三分钟后，让部分学生进行对话。)
T: Boys and girls, have you finished your discussion S1 and S2 , please!
S1: Does Mars have a good climate for plants
S2: Of course not. That’s impossible.
S1: Why
S2: Because the temperature on Mars is between -138℃and 28℃.
S1: Oh, I see. Is Mars a useful place to dry fruit
S2: No, I don’t think so.
S1: Is Mars a good place for human beings to live
S2: No, because it is too cold for people to live on.
S1: The last question. Is Mars a comfortable place for heavy people
S2: I don’t think so. Although the heavy people will be lighter on Mars, it’s still not a comfortable place for them to live. Do you agree with me
S1: Yes, I think so.
(再让一组同学讨论，教师点评这两组同学的表现，并予以鼓励。)
T: OK. Both of the two pairs are excellent.
2. (让学生听2的录音，然后回答问题。)
T: In dialog 1a, Kangkang wants to be an astronaut when he grows up. He wants to do some research in space. Here is an e-mail from Mars. Let’s listen to the tape, then answer the following questions on the small blackboard:
(出示小黑板。)
(1) Who is this e-mail from and to (2) How long did it take them to get there (3) Did everything go well during the journey
(学生听完后，师生一起核对答案。)
3. (再听2录音，完成2。)
T: Boys and girls, let’s listen again and fill in the blanks in 2.
(学生做完后，核对答案。)
(让学生大声朗读课文2，加深对文章的理解。)
T: Please read the completed e-mail loudly. In addition, pick out the difficult points.
(板书并要求学生理解。)
limit
(板书并解释。)
It has been two days since we landed on Mars. It is six weeks since we had a proper shower.
(教师讲解这两种句型的用法，要求学生理解并模仿造句。)
T: Now please make sentences according to the sentences on the blackboard. Who would like to make it first
S3: It has been two years since we learned English.
S4: It has been six months since we planted the trees around our school.
S5: It is ten years since I came here.
S6: It is three years since my uncle went to America.
Step 5 Project 第五步 综合探究活动(时间:5分钟)
通过设计火星上的生活区，对1a的内容进行拓展应用，写一篇作文。完成3。
1. (设计火星上的生活区。以图画的形式展示出来。)
T: Boys and girls, if we can live on Mars, can you design a place where we live Don’t forget to add schools, shops, gardens, etc.You can discuss with your partner and arrange everything well, then you can exchange the pictures.
2. Homework:
Suppose you are an astronaut and have just come back from Mars. Please write a report about the living conditions in the spaceship and the information about Mars, including its color, shape, climate, distance from the sun…
板书设计:
I don’t think aliens can be found in space.Section Cat a distance of… Mars goes around the sun at a distance of about … It has been two days since we landed on Mars. It is six weeks since we had a proper shower.
Section D
The main activities are 1a and 4. 本课重点活动是1a和4。
Ⅰ. Teaching aims and demands 教学目标
1. Learn some new words and a phrase:
beyond, separate, hand in
2. Review the use of “modal verb + be + P.P.”
3. Talk about our planet and living things on other planets.
Ⅱ. Teaching aids 教具
多媒体课件/教学挂图/录音机/幻灯片
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:7分钟)
通过图片造句，复习本单元重点语法项目——含有情态动词的被动语态，然后通过判断句子正误的方式巩固Section C，导入新课。
1. (多媒体展示一些图片，学生们根据图片内容造句，该句子必须是“情态动词+被动语态结构”，复习本单元语法。)
T: Hello! Boys and girls, in this topic we have learned a new grammar, the passive voice with modal verbs. Now, let’s look at the screen. Make some sentences according to the pictures. Please remember that you should use “modal verb + be + P.P.” Do you understand
Ss: Yes.
T: (多媒体呈现一个很脏的教室。) Here is a classroom. S1, can you make a sentence
S1: Yes. The classroom should be cleaned every day.
T: Good. Let’s look at next one. (呈现一幅环境污染图片。) S2, please
S2: The environment must be protected by us.
T: Excellent. Next one. (呈现一辆坏了的自行车图片。) S3, you please!
S3: The bike should be repaired.
T: Good. Next.(展现一幅小孩用脏兮兮的手吃苹果的图片。) Who can make a sentence
S4, can you
S4: Her hands should be washed before eating apples.
T: Right. Let’s look at next one. (呈现一片被砍伐的树林图片。)
S5: The trees shouldn’t be cut down by people.
T: OK, next. (展现科学家们正在认真做研究的图片。)
S6: Scientific research must be done carefully.
T: You did very well. Have you mastered the new grammar
SS: Yes.
2. (多媒体制作几句动漫的声音。让学生判断波利说的上一节课学过的关于火星的内容是否正确。激发学生的兴趣，达到复习的目的。)
T: Boys and girls. We’ve learned something about Mars. Do you still remember
Ss: Yes.
T: Let’s listen to what Polly says. Are her expressions about Mars right or wrong
Polly: Mars goes around the earth at a distance of about 228 million kilometers.
Ss: No, you are wrong.
Polly: It is one fourth as big as the earth.
Ss: No, it’s about half as big as the earth.
Polly: Mars looks like a red and black ball.
Ss: No, it looks like a red and orange ball.
Polly: It is very beautiful.
Ss: Yes.
Polly: A person weighs 120 kilos on the earth, but only weighs 48 kilos on Mars.
Ss: Yes, you are right.
Polly: The temperature on Mars is between -120℃ and 20℃.
Ss: No, it’s between -138℃ and 28℃.
Polly: It takes a spaceship from the earth about eight years to reach Mars when the two planets are closest to each other.
Ss: No, eight months, not eight years.
T: OK, boys and girls, you did very well. As we know, Mars is the fourth planet from the sun in our solar system. This lesson, let’s go on talking about solar system.
Step 2 Presentation 第二步 呈现(时间:14分钟)
利用太阳系的图片学习生词，导入新课，呈现1a，完成1b。
1. (出示教学挂图——太阳系，让学生们从感官上认识太阳系，教师导入新课。)
T: Boys and girls, just now we talked about Mars. Do you know how many planets there are in the solar system
Ss: Yes. There are eight.
T: Right. The solar system is like the home of the eight planets. Our planet, the earth, is the third planet from the sun. However, the solar system is a small part of the universe.
(板书并要求学生理解。)
universe
T: Scientists have sent up spaceships to explore other planets in the solar system. What’s more,
some spaceships have gone beyond the solar system.
(板书，讲解并要求学生掌握。)
beyond
T: Scientists will do more research on the space. So boys and girls, you must study hard, and try your best to make a contribution to the research one day. Do you think so
Ss:Yes, we will study hard.
T: OK. Next, let’s read the text to learn more about the solar system.
2. (学生打开课本，听1a录音并跟读，回答下列问题。)
T: Boys and girls, let’s listen to the tape. Read after it, then answer the following questions:
(幻灯片出示问题。)
(1) Has anybody found life on other planets (2) What’s called the solar system
(学生听后回答问题，教师核对答案，必要时可再放一遍录音。)
3. (让学生读1a, 选出恰当的标题。然后完成1b。)
T: Read 1a again. Choose the best title of the passage, then finish 1b。
(学生完成后，核对答案。)
T: Now, which one would you like to choose
Ss: Is There Life out There
T: Yes, good. Now look at 1b. Who can match the letters with their names according to 1a
S1: (B) the solar system
(D) the earth
(A) the universe
(C) the sun
T: OK, you did very well.
Step 3 Consolidation 第三步 巩固(时间:8分钟)
要求学生运用关键词复述课文，巩固1a。小组活动，完成2。
1. (学生再读1a，教师板书本课关键词和短语。)
T: Boys and girls, let’s find out the key words and phrases of the passage.
(板书)
scientists, life, millions of years, on other planets, the earth, seven, the solar system, universe, launch, beyond, discover, message, information, alone
2. (根据板书的关键词，引导学生复述课文。)
T: Look at the key words and phrases on the blackboard. Can you retell the text
Ss: Let’s have a try.
T: OK. Scientists, life, millions of years.
Ss: Scientists think that there has been life on earth for millions of years.
T: On other planets.
Ss: We haven’t found life on other planets yet.
T: The earth.
Ss: The earth is a planet and it goes around the sun.
T: Seven.
Ss: There are seven other planets that also go around the sun.
T: The solar system, universe.
Ss: The solar system is a small part of the universe.
T: Launch.
Ss: Scientists have launched many spaceships to explore other planets in the solar system.
T: Beyond.
Ss: Some spaceships have gone beyond the solar system.
T: Discover.
Ss: However, no one has discovered any life in space yet.
T: Message.
Ss: Why has no one from other planets sent us a message
T: Information.
Ss: Have they tried to send information to us
T: Alone.
Ss: Are we alone, or is there life on other planets in space
T: Good. You did very well. After class you should read the passage again and again until you understand it well.
3.(小组活动，完成2。)
Step 4 Practice 第四步 练习(时间:10分钟)
将情态动词的被动语态运用于1a中的部分句型，辅以练习，巩固本单元重点语法及功能句型，完成3a和3b。鼓励学生大胆表达，学以致用。
1. (通过本话题内容的拓展，复习总结本话题语法。)
T: There are so many planets in space. But no one knows if there is life on other planets. Scientists don’t know. We don’t know, either. But do you want to discover the secret
Ss: Yes, we do.
T: So what can be done to find out the truth
S1: More satellites must be sent into space.
S2: More scientific research should be done.
S3: Other planets may be visited in the future.
…
(学生会有许多奇思妙想，要允许他们大胆表达，但及时提醒他们用情态动词+被动语态
的句型结构，然后总结他们的回答或及时记录其中相关的句子，板书后总结语法。)
More satellites must be sent into space. More scientific research should be done. Other planets may be visited in the future. …modal verb + be + P.P.
2. (出示练习，巩固含有情态动词的被动语态，并学习4中的生词。)
T: Now, please change the following sentences into the passive voice. Don’t forget the modal verbs, and put them in the right places.
(用幻灯片呈现以下题干，请5名学生在黑板上做改写练习。其他学生同时在练习本上做。然后再用幻灯片依次呈现答案。师生核对答案。)
(1)We can see many stars in the sky on a fine evening. →Many stars can be seen in the sky on a fine evening. (2)You may find life on other planets one day. →Life may be found on other planets one day. (3)You should write the answers on a separate piece of paper.→The answers should be written on a separate piece of paper.(4)We should hand in our homework tomorrow. →Our homework should be handed in tomorrow. (5)The human beings mustn’t throw garbage into space. →Garbage mustn’t be thrown into space.
(板书解释画线生词及短语，并要求学生掌握。)
separatehand in
3. (复习本话题的语法重点和重要句型。完成3a和3b。)
Step 5 Project 第五步 综合探究活动(时间:6分钟)
小组活动，以本单元Space and Science为主题设置智力题，并根据其内容与结果，完成4。
1. (有关太空知识的智力抢答。)
T: Let’s do a Space and Science Quiz Show! Now, I divide the class into eight groups, and each group try to answer my questions. The group that answer the most questions will win. All the questions are about space or science. Are you ready
Ss: Yes.
T: Let’s begin. When was the second manned spaceship sent up by China
G1: In 2005.
…
(教师总结，评出优胜组。)
2. Homework:
Suppose there are aliens. Write a passage to introduce the earth to them, including clothing, food and drinks, weather, transportation, and so on.
板书设计：
I don’t think aliens can be found is space.Section Dhand inThe solar system is a small part of the universe. modal verb + be + P.P.I don’t think aliens can be found in space.More satellites must be sent into space.Other planets may be visited in the future.