Unit4 Inventions 复习课件(共11张PPT).pptx

InventionsInventions Which invention do you think is the greatest one?Why?Reading P50 Reading P50 I think its.Becausechange the _help people live a _The wheelSignificance:_ became faster and more comfortableUse:a few thousand years ago:on carriages in the early 19th century:on _ at the start of the 20th century:on _The telephoneInventor:_(in 1876)Significance:people can speak to each other over _people can keep in touch with each other anytime,_Great inventionsThe light bulbInventor:Thomas Edison(in _)Before the invention:people used _,gas lamps,_Significance:people can do many things in the evenings as they can _worldbetter lifetravellingtrainscarsAlexander Graham Belllong distancesmobile phones:anywhere1879oil lampscandlesin the daytimeComplete the graphic organizer and then retell the Complete the graphic organizer and then retell the text according to it.text according to it.The _ is probably the greatest invention in history.Without the wheel,we would not have the _,trains and _.One of the first practical telephones was _ in 1876.People could _ to each other _ long distances.Today we use _ phones to _ _ _ _ each other anytime,anywhere.Before the _ of the light _,people had to use oil lamps,_ lamps or _ to see at night.Now,people can do _ _ things in the evenings _ _ _ in the daytime.wheelcarriagescarsinventedspeakovermobilekeep in touch withinventionbulbgascandles as manyas they canFill in the blanks to finish the summary of the text.Do you know why the ballpoint pen was invented?People used the fountain pen(钢笔钢笔)to write before the ballpoint pen was invented.have to refill it all the timemake a messcant dry easilyRead the article to learn more Read the article to learn more about the ballpoint pen.about the ballpoint pen.1.Why did Br decide to invent the ballpoint pen?2.How did Brs brother help him invent the ballpoint pen?3.How does the ballpoint pen work?4.How do people remember Br for his invention today?Because he had to refill his fountain pen all the time,and the ink did not dry easily and it sometimes made a mess on the paper.Brs brother helped him develop a special ink.The ink dried easily.There is a tiny ball at the tip of the pen.The ball rolls ink onto paper as it moves.In many English-speaking countries,people still use the word“biro”to refer to any kind of ballpoint pen.Can you name some other great inventors and their inventions?Cai LunpapermakingBellthe telephoneThomas Edisonthe light bulbCulture corner P621.What are they in the first picture?2.When were they invented?3.Who invented them?4.What did Zhuge Liang use them for?6.Do you know the relationship between these two pictures?They are Kongming Lanterns.During the time of the Three Kingdoms.Zhuge Liang.He used them to give signals in battles.The Kongming Lantern led to the invention of the hot-air balloon.Mini test:1.Please list the four great inventions in ancient Cpassprintinggunpowderpapermaking2.Please list the four New Four Great Chinese Inventions.high-speed railwayshared bikesAlipayTao BaoGreat inventions change the world.They help people live a better life.Which do you think is the greatest invention during the COVID-19?New Crown VaccineOnline classesRobot Dogunmanned aerial vehicle (UAV)Be more creative to create things that meet our needs.牛刀小试:1.We can _ on the Internet.That is to say we can place _ on it.(advertise)2.Tom told us many _ stories and we have _ at the story-telling party.(fun)3.Edison is a famous _.He was so _ that he _ many _.(create)4.The old car becomes _ than before,so we need a new one.(comfortable)5.Gilbert discovered electricity,but Edison _ the lighter.Edison is the _ of lighter.(invent)6.We need to practise _(run)in our daily life because it is _(practice)to build up our body.7.This is the _ of the novel.It _ the main plot of the story _ us.(introduce)8.My hometown is in a _ area.There is a long _ from it to Shenzhen.(distance)9.In the past 40 years,Shenzhen _ a lot.Shenzhen is famous for its rapid _.(develop)10.Passengers can go there by bus instead of _(take a train).advertisean advertisement 或或advertisementsfunnyfuncreatorcreativecreatedcreationsmore uncomfortableinventedinventorrunningpracticalintroductionintroducestodistantdistancehas developeddevelopmenttaking a train