2. Unit 4 Amazing Science Topic 1 When was it invented ? Section D

3. Learning aims 1. 能正确拼读新单词： explorer 、 mark system 、 man-made 2. 掌握重点词组： guiding marks 、 the rest of the time 等 3. 复习一般过去时的被动语态。 4. 了解古代和现代人确定方位的方法，明白 学习科学文化知识的重要性。

4. 《同步练习册》第一题

5. Read and understand

6. 1. How did the early explorers know where they were? They found out where they were by using stars. 2. What’s the disadvantage of using the stars as guiding marks? Its disadvantage is that it didn’t work well when the weather was bad and the stars could not be seen. 3. What is a GPS? Is it useful to use? It is like a man-made star. We can use it at any time, in any place and in any weather to find out our position. It is very useful. 4. What do you think the GPS will be used for in the future? … Read the passage and discuss the questions on Page88.

7. ListenListen and read

8. Translate happily 1. 导向标 2. 奏效、起作用 3. 剩余时间 4. 人造星星 5. 在任何时间、任何地点、任何天气 1.guiding book2.work well3.the rest of the time 4.a man-made star 5.at any time 、 in any place in any weather

9. Learn in groups 1.The early explorers found that the stars in the sky were good guiding marks. 2……and in which direction they were going. 3.But it didn’t work so well.

10. Language points 1.mark 作动词意为 ________________ 作名词意为 _______________ 2.in…direction 意为 _________ Eg: 相反的方向 ________________ 同一方向 ______________ 造句：那辆摩托车撞上了一辆迎面开来的卡车。 ________________________________________ 3. work well _________________ 相关短语： work out 意为 ___________ work at 意为 ___________ in the opposite direction 朝 …… 方向 in the same direction That motor bike hit a truck coming in the opposite direction 奏效，起作用，产生影响 作记号、作标记 标记、记号、分数 算出、演算出 从事于、致力于 …

11. 根据首字母提示，完成短文。 Thanks to GPS, we can exactly know w _____we are now. GPS is like a man-made “star”. It can be u____ in any place and any weather condition to find out our p________. In the past, the early explorers had to use stars in the s____ to tell them where they were, however, this method didn’t work well when the weather was bad. So GPS is a great invention that can help humans to better e________ our planets. here osition sed ky xplore Class feedback

12. Functions I wish I could go into space some day. I hope your dream will come true. It’s said that he invented more than two thousand things during his life. Inventing is interesting and exciting and everyone can be an inventor. Can you remember them in one minute?

13. Grammar Passive Voice ( Ⅱ ) The radio was invented by Guglielmo Marconi in 1895. When was the digital camera developed ? Where was it developed? What is a rocket used for? It was developed in the 1970s. It was developed in Japan. It is used for sending satellites or spaceships into space. 一般过去时的被动语态构成： were/was + v. 的过去分词

14. 1.You are late, all the tickets __________(sell) out an hour ago. 2.This type of cellphone ____________(make )in Shenzhen. 3. I _________________ ( not invite) to yesterday’s party. 4. ________ those machines __________(check) this morning? 5. Many trees and flowers ______________(plant) in our school last year, and they made our school a beautiful garden. were sold were made wasn’t invited Were checked were planted

15. Passive voice was /were +done ( ) 1. A big supermarket _____in our city last year. A. is built B. were built C. was built ( ) 2.Could you tell me who the radio ____ by? A. invents B. invented C. was invented ( ) 3. Many trees and flowers _____ in our school last year. They made our school more beautiful. A. have planted B. were planted C. planted ( ) 4.The children ____ swim last month and they can swim very well now. A. are taught B. were taught C. were taught to ( ) 5.It is said that potato chips _____by mistake about one hundred years ago. A. were invented B. invented C. are invented C B C A C Grammar exercise

16. ( ) 1.Hurry up, you ____ on the phone. A. WantedB. was wanted C. are wanted ( ) 2. Some stories _____the children by the teacher everyday. A. is told forB. are told for C. are told to ( ) 3._____that he has studied abroad for five years. A. It is saidB. It says C. That is said ( ) 4.The window ____ five minutes ago. A. is cleaned B. was cleaned C. can be cleaned ( ) 5.The children ______by the teachers at school. A. take care of B. are taken care C. are taken care of C C A B C Choose the best answer.

17. ( ) 6. I have no idea what ______while I was asleep. A. happened B. was happened C. happens ( ) 7. In some countries, tea _____before meals. A. is servingB. is servedC. served ( ) 8. This kind of books ______well. A. doesn’t sellB. isn’t sellingC. aren’t sold. ( ) 9. I ______ten minutes to decide which sentence was right by the teacher. A. gaveB. was givenC. was giving ( ) 10. Teachers ______in every part of the world. A. are needingB. are neededC. will need A B A B B

18. Homework 完成 < 同步练习册》 其余习题

19. We Learn: 1. Some words : mark, explorer 2. Some phrases: find out, in …, direction, as long as, work well, the rest of the time, be used to, the shape of 3. Some sentences: This method worked well at night as long as the weather was good and the stars could be seen. We can: 1. Use the passive voice of the simple past tense more properly. 2.Talk about new technology GPS. 3. Develope our imagination and creativity by designing our own inventions.

20. Thank you