Unit 9 When was it invented? Section A Period !

课件38张PPT。导言
人类的每一次改革都是社会前进的步伐，每一次思想的升华都越来越接近文明。发明使人类由黑暗走向光明。正因为如此，社会离不开发明。让我们一起走向发明的前源吧。
When was it invented ?Period 1MuseuminventionPeople who can work out(算出) this complicated math problem could go into the door!35+74*8-52*2+573-21=?Some rulesExample: In the museum, we are (not) allowed to …compassgun powderprintingpaperChallenge One:guessing gameWhat is it?What is it?What is it?What is it?What is it?What is it?What is it?This thing has number on it. It is small but it can help you work out math problems.What is it?When you want to go out for a drive, you can use it.It is very fast.What is it?Here is a box with a beautiful glass face.It looks like a TV, but it isn’t.
It can help you work and study.Challenge Two:Who is the luckiest?Discuss: In what order do you think they were invented?
I think … was invented before/after…1bListen and match the inventions
with the dates.abedc1876
1885
1927
1971
1976dabecdaecbChallenge Three:Memory challenge--When was the car/…invented?
--It was invented in _____ 18761927197618851971Challenge Four:Listening challengeQuestions:1. What is the invention?
2. Who invented it?Bell invented the telephone.The telephone was invented by Bell.We also can say:Pairwork:
--Who was the car/…invented by?
--It was invented by _____ New Inventionshigh heelsshoes with adjustable heelsNew inventionsbatteryslippersbattery-operated
slippersNew inventionsice cream
scoopheated ice
cream scoopbattery-operated
slippersheated ice
cream scoopshoes with adjustable heelsGuess:
--What is it used for?
--It is used for _____ 2aListen and number the inventions in
the order that you hear.312How many inventions do you know? Group work: music candleactivity glassestemperature cupTry to be a little inventor!Thank you for your time!