课件19张PPT。Unit 4 Amazing Science Topic 1 When was it invented ?Section DWhat’s it used for?
It’s used for listening to music.
What’s it made of?
It’s made of plastic.
Where was it invented?
It was invented in Korea.
When was it invented?
It was invented in 1998.What’s it used for?
It’s used for communicating easily.
What’s it made of?
It’s made of plastic and metal.
Where was it invented?
It was invented in America.
When was it invented?
It was invented in 1973.What method did you use to find your lost cellphone?GPS 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. The early explorers used the stars as landmarks to know where they were and in which direction they were going. This method worked well at night as long as the weather was good. But it didn’t
work so well during the rest of the time.Let’s use the GPS.n.探险者，
勘探者
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.Key wordsexplore
explorer, mark
find out, in…direction
work well, as long as
the rest of the time
solve, like, use, the shape of
great inventionn.标示，记号，符号
v.做记号，做标记Retell it !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.hereositionsedkyxploreExerciseGrammar 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. Functions 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
CBCACGrammar exercise
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 soldwere madewere/was + v.的过去分词Exerciseswasn’t invitedWerecheckedwere planted
1.People use radios to learn English in the past.
_____________________________________________
2.Jack will show me the photo.
______________________________________________
3.They have raised much money for the Project Hope.
______________________________________________
4.I often hear Mary sing English songs at home.
_______________________________________________
5.We mustn’t throw litter about.
________________________________________________
6.People can visit planets like Mars.
_________________________________________________
Radios were used to learn English in the past.The photo will be shown to me. Much money has been raised for the Project Hope.Mary is often heard to sing English songs at home.Litter mustn’t be thrown about.Planets like Mars can be visited.Change the following sentences into Passive Voice.
( ) 1.Hurry up, you ____ on the phone.
A. Wanted B. was wanted C. are wanted
( ) 2. Some stories _____the children by the teacher
everyday.
A. is told for B. are told for C. are told to
( ) 3._____that he has studied abroad for five years.
A. It is said B. 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 CABCChoose the best answer.( ) 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 serving B. is served C. served
( ) 8. This kind of books ______well.
A. doesn’t sell B. isn’t selling C. aren’t sold.
( ) 9. I ______ten minutes to decide which sentence was
right by the teacher.
A. gave B. was given C. was giving
( ) 10. Teachers ______in every part of the world.
A. are needing B. are needed C. will need
ABABBPractice makes perfect.Project (1) Name: Plar (plan-car)
Inventor: Kangkang
Year: 2014
Use: Both flying and driving This is Kangkang’s invention.
Look at the information and the picture.
What do you think of it ?
Discuss with your partners. 2. Design your own invention. Draw a picture of it and write down the information about it. Name :____________
Inventor:___________
Year:_____________
Use:______________ Project （2）
Describing Your Invention 3. Show the picture of your invention and describe it to the class.
4. Discuss in groups to decide which is the most useful /interesting/funny invention. 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.SummaryRead 1a.
Memorize the useful expressions and key sentences that we learn in this topic.
Finish Section D in your workbook.
Preview Section A of Topic 2.
AssignmentThank you
