九上U4T2SB.pptVIP

* 。 Unit 4 Amazing Science Topic 2 When was it invented? Science make our world wonderful! Michael, Jane and their classmates are visiting the Science Museum. Look, a light bulb! When was it invented? Who was the inventor? Listen and answer the questions. In 1987, by Thomas Edison （录音p87-1a） Read 1a again and complete the table. 1903 Guglielmo Marconi Light bulb Year Inventor Invention Radio Airplane Thomas Edison Wilbur and Orville Wright 1879 1895 重点词（组）和句型 1.in our daily life in our everyday life 2.invent v. inventor n. invention n. The inventors invented many great inventions. 3.It’s said/reported that-clause. 4.during one’s life in one’s life invent /America/in 1946 A: Where were computers invented? B: They were invented in America. A: When were computers invented. B: They were invented in 1946. Look and talk about the picture. Pair work. Make up dialogs after the example. ShenzhouⅦ lauch /in China/in 2008 Pirates of the Caribbean direct/by Gore Verbinski/in 2006 laptop invent/in Japan/ in 1985 Know something about science. Cloning----- a famous experiment the cloned sheep--- was created in Scotland a few years ago. the cloned mice the cloned cows the cloned pigs the cloned animals Listen and answer the questions. 1.What’s the name of the cloned sheep? Dolly. 2.What animals have the scientists cloned now? Sheep, rabbits, cows, mice, pigs and some other animals. 3.What is used in cloning? DNA. 4.Is your DNA similar to your parents’? Yes, it is. （录音p88-3a） 3b Group work Read 3a again and discuss the following questions. 1. Who is Dolly and what is used in cloning? 2. What are the advantages and disadvantages of cloning? ( )1.The cloned sheep, Dolly,was cloned in Canada. ( )2.Scientists have cloned pigs. ( )3.Every part of our body has different DNA. ( )4.There is DNA in all liv