1、Unit 4 Astronomy the science of the starsUsing language Do you know the following scientists?Who are they?What have they discovered?Listening and discussingIsaac Newton,牛顿16421727 Universal gravitation 万有引力Einstein,Albert(1879-1955)爱因斯坦Relativity（相对论）and the Cosmos（宇宙）The theory about black holes（黑洞
2、理论）Listen to Part 1 and Part 2 of the tape and choose the best summary of the listening text.A The text is about how three scientists wanted to find out about the beginning of the universe.B The text is about how the idea of gravity has developed over a long period of time.C The text is about the im
3、portance of three scientists and their work.Isaac Newton IdeaDevelopmentLarge bodies have a force which pulls things towards them.The bigger the object the stronger the gravity.Listen to Part 1 again and fill in the first column of the chart.Then listen to Part 2 again and fill in the rest.IdeaDevel
4、opmentAlbert EinsteinStephen HawkingIn space large objects make space and time bend;the larger the object,the further space and time bend.Black holes have a very large mass and pull things towards them.If you go over the edge,you cannot get out;but if you do not,you may be able to escape.Time goes s
5、lower in very strong gravity.Reading A VISIT TO THE MOONRead the whole passage and answer the following questions.1.How many times would the force of gravity change on our journey?2.Why is the spaceship not falling back to he earth?3.What happened when the writer tried to step forward?He found he wa
6、s carried twice as far as the earth and fell over.Fast reading Because they are too far from the earth to feel its pull.Three times.Important sentences and language pointsCareful reading 1.I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become small
7、er and the moon larger.cheer up:欢呼，喝彩，感到高兴，使高兴。当看到球队的到来，人群欢呼起来。_ when they saw the team arrive.他带她去听音乐会来使她高兴。He took her _ to _.The crowd cheered upto the concertcheer her upwatch do/doing:观看，注视我们看着太阳正在树后面落下。We _ behind the trees.每一天当他们看到植物生长，他们的心里都充满了希望。Every day as they _,their hearts filled with
8、hope.watched the sun settingwatched the plant grow2.Oh dear,I cried,walking does need a bit of practice now that gravity has changed.now that:既然，由于既然每个人都到了，我们就可以开始会议。_,we can begin the meeting.由于你是一个大男孩,你就必须行为表现得更好._,you must behave better.Now that everybody is hereNow that you are a big boy3.We wat
9、ched,amazed as fire broke out on the outside of the spaceship as the earths gravity increased.amazed 是过去分词，此处做状语用他进来的时候没有人注意到.He came in _.break out (战争,争吵,疾病等)爆发在深夜,突然有人吵架._ suddenly at midnight.A quarrel broke outunnoticedHomeworkReview the reading materials.Find out the beautiful sentences in this unit.
