Unit 9 When was it invented （Section A 3a-4）

课件31张PPT。Section A: 3a-4Unit 9 When was it invented? Period 3Guessing gamesRead the following
and guess what it is .This invention looks like a bird. It’s very strong. It can take several hundred people to any place in the world.airplaneWhat is it used for?It is used for taking people to any place in the world.This little thing has numbers on it.It’s small, but help you work out math problems.calculatorIt is used for calculating.What is it used for?It is very small, so you can put it into your pocket. Wherever you go, you can use it to talk to your friends and your family far away.mobile phoneThis little thing has numbers from 0 to 9. What is it used for?It is used for talking to the friends or family without meeting.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.computerWhat is it used for?It is used for working or studying.Here is a box with a beautiful glass face .You can see different people in different countries.televisionWhat is it used for?It is used for knowing what has happened in the world. Here is a big box . It’ s very hard-working. It can make your clothes clean and your housework easy. With its help you can have more time to relax or to work.washing machineWhat is it used for?It is used for helping wash clothes.Here is a box. You can use it to cook many kinds of delicious food, such as fish ,meat and rice. You can also use it to make cold food hot in a few minutes. microwave ovenWhat is it used for ?It is used for cooking food or making food hot.①What’s this called in English?
→ It’s called a bookcase.
②What’s it made of ?
→ It’s made of wood.
be made of 由-----做成
③What’s it used for ?
→ It’s used for storing(贮藏) books .It is a stamp.
It is made of paper.
It is used for sending letters.It’s a chair.
It is made of wood.
It is used for sitting.It is a pair of glasses.
It is made of glass.
It is used for seeing clearly.It’s a cup.
It is made of china(陶瓷).
It is used for drinking.What’s it called what’s it made of what’s it used forchair
glasses
jacket
stamp
key
bookcase wood
glass
wool(羊毛)
paper
metal(金属)
woodsitting
seeing clearly
keeping warm
sending a letter
opening and locking a door
storing booksA: What’s that called in English? B:It’s called a chair.
A: What’s it made of ? B:It’s made of wood.
A: What’s it used for? B:It’s used for sitting.What’s it made of?It’s made of metal.Where is it made ?It’s made in Beijing.What’s it made from?It’s made from sea water.Where is it made ?It’s made in East and South China.saltbe made of 由……制成 可看出原材料 物理变化
be made from 由……制成，看不出原材料 化学变化
be made in +地点 由（什么地方）生产的
be made by + sb 强调制造者 be madeComplete the following with right prepositions and translate them into Chinese.
1.Stamp is made　　　paper.
2.Tables are made ____ wood.
3.This beautiful card is made　　　Tom.
4.This kind of paper is made　　rags(破布).
5.Paper can be made　　bamboo（竹子）.
6. This kind of TV is made　　　Japan.
7. Beer is made　　　barley (大麦).
ofoffromfromfrombyinbe used for doing sth. =be used to do
被用来做……介词for表示“用途”
be used as 意思是“把……当做……用。”
be used by +sb 被（某人）使用be used1. I use this card　　　a bookmark.
2. This material (材料)is used ____drawing.
3. My bike is used　　　my sister.
4. English is used _____ a second language
in China
5. This kind of machine is used ______
cook food.asforbyastoA: What is the mp3 used for?B: It is used forlistening to music.listen to musicA: I think it is a helpful invention.
Because I like listening to music.A: What is this called in English?B: It’s called an MP3.alarm clock --- I think it’s an annoying invention. Because it wakes me up when I’m sleeping. wake people up ---- What is the alarm clock used for?---It is used for . waking people up binoculars --- I think it’s an interesting invention .
Because it can help us see more things.see something far more clearly ---- What is the binoculars used for?---It is used for . seeing something far more clearly A: What do you think is the most helpful invention?
B: I think the most helpful invention is the light bulb.
A: Why is that?
B: Well, it gives people more time to work and play every
day.telephonealarm clockplanecomputerbikecartrainatomic bombmissile gunchemical weaponsplastic bagsMake a list of five helpful inventions and five annoying inventions.3aWhat do you think is the most helpful/ annoying inventions?A survey Julie thinks the computer is the most helpful invention because it helps her search the information that she needs. But she also thinks …the is the most annoying invention because…Report JuliecomputerLet's boast!If you are alone on a tiny island(小岛) , what would you need?吹牛皮 compassWhat would you need?torch Imagine that you are alone on a tiny
island.Choose five inventions you would like to have on the island with you .Tell the group of four what you chose and whyGroupworkA: I’d like to have a radio because I could listen to music all day. B: Yes, but it’s not going to help you leave the island. I think it would be better to have…guntelescopetorchA: I’d like to have a radio.
B: Why is that?
A: Because I could listen to music all day.
B: But that’s not going to help you leave the island.I think it would be better to have a computer.Groupwork: Imagine(想像) that you want to leave the island. What would you need?1._____________________________________
2._____________________________________
3._____________________________________
4._____________________________________
5._____________________________________1. How much is it?
2. Where is it made?
3. Which one did she buy at last,the expensive one or the ordinary（普通的） one?
4. Where is it made?5,000 yuanIn Japan.The ordinary one .In Shanghai .Homework:Write a short article about “1 or 2 Important Inventions In My Life”. Tell us, what are the most important inventions in your daily life? Write more information about them and the reasons. Goodbye!