冀教版九上U5LookintoScience-L25Let’sDoanExperiment课件.ppt

1、Unit 5 Look into ScienceLesson 25 Lets Do an Experiment1.Do you like science?2.What kinds of experiments have you done in science class?3.If you hold a jar that is filled with water upside down,what will happen?upside downaa倒置的，颠倒的right side upa正面朝上upside a上边，上部sciencea科学adj.scientifica do an experi

2、ment做实验What can they do?jar:广口瓶，罐子fill装满How many strawberries?observe：观察，监视Whats he doing?ingprove 证实;证明 method 方法;办法Listen to the tape and answer the questions:1.What will Brain do?2.Why does Danny say they should do this experiment outside?Brain will do an experimentBecause Danny thinks the floor

3、will get wet.I think:“我认为”,其后可接that引导的宾语从句。在使用时要注意，否定主句,反问从句。get wet意为“变湿”。后接形容词作表语。pour out：“倒出,使流出,涌出”。pourinto：“把倒进”。be sure of：“确信；对有把握”put on：“穿上”,为“动词+副词”构成的短语。“It is+形容词+enough to do sth.”“做某事是足够的”。=tooto=sothat。conclude from意为“从推断,从中得出”。find,find out,discover,invent(1)find意为“找到,发现”,强调“找”的结果,

4、也可指偶然发现、碰到,其后可接名词、复合结构或that从句。(2)find out指“弄清楚,查明”。着重表示通过调查、分析、思考等得出结果。(3)discover意为“发现”,指发现已存在但不为人所知的事物。(4)invent意为“发明”,指发明原来不存在的东西。(1)Where does Danny think they should do the experiment?(2)What keeps the water in the jar?(3)Is Jenny sure of her theory?How do you know?(4)Why does Danny put on his

5、raincoat?(5)What does Danny conclude?Read the lesson and answer the questions.Danny thinks that they should do the experiment outside.The force of the air./The air pressure.Yes,she is.She is so sure of her theory that Brian can do the experiment over Dannys head and he wont get wet.Because he thinks

6、 he will get wet.Air is stronger than he thought.Put a piece of cardboard over the jar.The jar of water is upside down,but the water stays in the jar.This is because air pressure pushes the cardboard onto the jar.Fill the glass jar with water.Turn the glass jar over quickly.Hold your hand on the car

7、dboard for a few seconds.Remove your hand from underneath the jar.What happens?There is more air outside the jar than inside,so there is more air pressure outside than inside.Read the experiment.Put the sentence in the correct order.251346What happens when you use less water,more water,wet cardboard

8、,or different kinds and sizes of jars?Try to do the experiment in this lesson yourself.1.Make a list of the materials and tools that we will use in the experiment.2.Write down two different theories.Retell the process of the experiment.3.Write down the steps of doing the experiment.4.Write down the

9、result of the experiment.Summary the experiment.How do we do the experiment?Lets do an interesting experiment.First,I _ a jar _ a desk,_ it _ water,then _the top _ a piece of cardboard.When I _the jar _ _,can you guess what will happen?downputonfillwithcoverwithturnupsideWhat is science?What is scie

10、nce?Can you explain?Please make it easy for my brain.Its about making observations.Why do onions make me cry?Why do clouds go by?What keeps the birds in the sky?Thats just science.Its about matterthe universe.Why does a car stay on the road?Why is there green all over a toad?Why cant I carry a heavy

11、 load?Thats just science.1.Listen and read.2.Finish exercises of this lesson.HomeworkHave you ever visited someone in the hospital?What do you want to do when you are sick?阑尾炎appendicitis阑尾appendix困倦的，欲睡的sleepy提到，谈到，说起mentionMain phrases:take outnow thatso thatwrite to sb.one ofin hospital“生病住院”in t

12、he hospital “在医院工作，或探望病人”sleepy作形容词，意为“困倦的、瞌睡的、安静的、冷清的”，在句中作定语或表语。This is a sleepy village,isnt it?这是一个寂静的小村庄，是吗？Fortunately,you and Wang Mei are both getting much better now.幸运的是，你和王梅现在都好多了。比较级前可以用much,even,still,far,a bit,a little,a lot 等词加以修饰。Im a little taller than she.我的个子比她的个子稍高一点。Now that you

13、 mention it,Wang Mei also had a bad day.now that为连词词组,意为“既然,由于”,用来引导状语从句。在原因状语从句中,now that和since意义相近,都表示“既然,因为”,但语气较弱,强调人们已知的事实。mention为及物动词,意为“提到,写到”,后接名词或代词。mention sb.提到某人;mention sth.提到某事;not to mention更不用说。One of her teeth was rotten,so she had to go to the dentist.one of意为“中之一”。one of后的名词要用复数形

14、式,形容词要用最高级;one of在句子中作主语时,谓语动词要用第三人称单数形式。I think we should try hard to form good habits so that we can stay healthy and stay away from the hospital!so that意为“以便,为了,目的是”,用来引导目的状语从句,常和can,could,may,might等情态动词连用。so that还可用来引导结果状语从句,意为“结果,以至于,因此”。sothat意为“如此以至于”,so后接形容词或副词原级。Read the text and answer the

15、 questions.Why did Danny stay in the hospital?2.What advice did the doctor give to Danny?3.Is Wang Mei getting much better now?4.Whats Li Mings advice for staying healthy?Because he had appendicitis.The doctor told Danny to drink plenty of water and have a good rest.Yes,she is.We should try to form

16、good habits.Fill in the blanks with the correct forms of the phrases in the box.millions of,now that,have no choice but to,be rich in1.The boys mother is very ill.He get a job and earn money.2.people take the subway every day.3.With plenty of water and oil,our country natural resources.4.you have se

17、en how it works,why not try it yourself?Now thathas no choice but toMillions ofis rich inComplete the passage with the sentences in the box.What is a heart attack?Your heart is a muscle.It moves blood around your body.To do its job,your heart muscle needs blood,too.Then you have a heart attack.To ke

18、ep your heart well,you need to take care of your heart.They are good for your heart.Eggs,meat,cheese,butter and ice cream have a lot of fat,which is bad for your heart.Dont eat too much of these foods.Also,exercise every day.Do not smoke.A.Eat lots of fruits,vegetables,grains and fish.B.Smoking is very bad for your heart and your lungs.C.If it doesnt get blood,it cant work.Group work:Imagine that last time you were ill.What did you do to recover?Homework:1.Finish the exercises in the activity book.2.Composition:How to stay healthy.