山西省吕梁市石楼县石楼中学高中英语 Module5 Introduction .ppt

1、外研版高一年级(必修1)Module 5 tongs crucibledissolvesolid/liquid/gasbalanceBunsen burnertest tubetest tube1.(a)Water exists as a solid,a liquid and a gas.(b)Water exists as a solid and a liquid only.2.(a)When you heat a metal,it expands.(b)When you heat a metal,it contracts.Guess,listen and check the answer.

2、Listening 3.(a)Steel is a mixture of iron and other substances.(b)Steel is a mixture of iron and oxygen.4.(a)Two-thirds of the earths surface is water.(b)50%of the earths surface is water.5.(a)The distance of the sun from the earth is 25,5000 kilometres.(b)The distance of the sun from the earth is 1

3、50,500,500 kilometers.6.(a)The earth is 4.6 million years old.(b)The earth is 4.6 billion years old.7.(a)The earth is twice as large as the moon.(b)The earth is forty-nine times larger than the moon.Put the words in pairs or groups.contract air earth gas liquid contract air earth gas liquid oxygen m

4、oon solid expand sunoxygen moon solid expand sun1234air gas-oxygencontract-expandearth sun-moongas liquid-solid1.liquid:液体2.expand:vi.使.膨胀Metals expand when they are heated.3.contract vi.收缩Metals contract as they get cooler.4.substance n.物质5.mixture n.混合物6.oxygen 氧气7.electricity n.电Answer the questi

5、ons.1.Which of the above are natural?2.Electricity,iron,some metals and air are natural.2.Which are man-made?Steel,some metals and glass are man-made.electricity iron metal steel air glass3.Which can be both?Electricity and some metals(alloys for example)can be man-made and occur naturally.Listening

6、 and writing You will hear a conversation in which a teacher helps a student do an experiment.Read the Aim below and predict the Result.Aim:To find out if there is a change in weight when the metal magnesium burns in air.Result:_.Aim:_ _ _To find out if theres a change in weight when magnesium burns

7、 in air.Listen and complete the description of the scientific experiment.Apparatus:_ _Method:_ _ _ _ _ _ _Magnesium,Bunsen burner,a balance,a crucible.First,put the magnesium in the crucible.Then put the crucible on the balance and weigh it.Next,heat the magnesium.Light the Bunsen burner and hole th

8、e crucible over it.Finally weigh the magnesium again.Result:_Conclusion:_ _ _It weighs a little more than before.There is a change in weight when magnesium burns in air.1.“Where do we go from here?”means _.A.What shall we do next?B.Is this the right way?2.“Keep the noise down”means_.A.Dont talk B.Ta

9、lk quietlyChoose the correct meaning.3.“Youve got it”means _.A.Youve understood B.You have something 4.“Go ahead!”means _!A.Go away B.Begin 5.“Its your turn”means _.A.Youre next B.Turn round Decide what the aim of the experiment is.Listening and speaking on Page 95The aim is to write a secret messag

10、e.Put the stages in the correct order.1.2.3.4.b squeeze lemon and pour the juice into a containerf dip your pen into the juicea write your message on a piece of paperg blow on the paper to dry the lemon juice5.e light a candle6.c heat the paper in the candle flame7.d the message appears when the juice reacts with oxygen and produces brown oxideHomeworkPreview Vocabulary on Page 46.