Unit 1 Great scientists教学设计07

Unit1Great scientistsTeachingaims

1.To helpstudents learnto describepeople

2.To helpstudents learnto reada narrationabout John Snow

3.To helpstudents betterunderstand Greatscientists^^

4.To helpstudents learnto usesome importantwords andexpressions

5.To helpstudents identifyexamples of“The PastParticiple1as thePredicativetheattribute”Period1Warming up and readingTeachingProcedures

1.Warming upStepI LeadinTalk aboutscientist.T:Hi,morning,class.Nice to see youon thisspecial day,the daywhen youbecome asenior twograder.I amhappy tobe withyou helpingyou withyour English.Today weare toread abouta certainscientist.But firstlefs definethe word“scientist”.What is a scientistAscientist isa personwho worksin science,trying tounderstand howthe universeor otherthingswork.Scientists canwork indifferent areasof science.Here aresome examples:Those thatstudy physicsarephysicists.Those thatstudy chemistryare chemists.Those thatstudy biologyare biologists.Step IIAskthe students to trythe quizand findout whoknows themost.T:There aresome greatscientific achievementsthat havechanged theworld.Can youname someof them Whatkind ofrole dothey playin thefield ofscience Dothese achievementshave anythingincommon Matchthe inventionswith theirinventors belowbefore youanswer allthese questions.

1.Archimedes,Ancient Greek287-212BC,a mathematician.

2.Charles Darwin,Britain1808-

1882.The nameof thebook isOrigin ofSpecies.

3.Thomas Newcomen,British1663-1729,an inventorof steamengine.

4.Gregor Mendel,Czech,a botanistand geneticist.

5.Marie Curie,Polish andFrench,a chemistand physicist.

6.Thomas Edison,American,an inventor.

7.Leonardo daVinci,Italian,an artist.

8.Sir HumphryDavy,British,an inventorand chemist.

9.Zhang Heng,ancient China,an inventor.

10.Stepper Hawking,British,a physicist.IL Pre-readingStep IGetthe studentsto discussthe questionson page1with theirpartners.Then askthe studentstoreport theirwork.Encourage thestudentstoexpress theirdifferent opinions.

1.What do you knowabout infectious diseasesInfectious diseasescan bespread toother people.They havean unknowncause andneed publichealth care to solve them.People maybe exposedto infectiousdisease,so mayanimals,such asbird flu,［已AIDS,SARS areinfectiousdiseases.Infectious diseasesare difficult to cu

2.What doyou knowabout choleraCholera is theillness causedby cbacterium calledVibrio cholerae.It infbctspeoples肠,】抽筋intestines causingdiarrhea andleg camps.The mostcommon cause of cholerais by亏染someone eatingfood ordrinking wateithat hasbeen contaminated6with thebacteria.Cholera can不严重的症状，be mildor evenwithout immediatesymptoms buta severecase canlead todeathwithout immediatelytreatment

3.Do youknow howto provea newidea in scientific researchAnybodymight comeout witha newidea.But howdo weprove itinscientific research Thereareseven stagesin examininga newidea inscientific research.And theycan beput in the followingorder.What orderwould youput theseven inJust guess.Find a problem—Make upa question—Think ofa method—Collect results—Analyse theresults一Draw a conclusion—Repeat ifnecessaryIII.ReadingStep IPre-reading

1.Do youknow John SnowJohn Snowisawell-known doctorinthe19th centuiyin Londonand hedefeated King Cholera”.

2.Do youknow whatkind ofdisease ischoleraIt isa kindof terribledisease causedby drinkingdirty waterand itcaused alot ofdeaths inthe oldtimesand itwas verydifficulttodefeat.Lefs getto knowhow Dr.John Snowdefeated“King Cholera,,in1854in Londonin thisreadingpassage:Step11SkimmingRead thepassage andanswer thequestions.

1.Who defeatsKing CholeraJohn Snow

2.What happenedin1854Cholera outbreakhit London.

3.How manypeople diedin10days

5004.Why is there nodeath atNo.20and21Broad Streetas wellas atNo.8and9Cambridge StreetThesefamilies hadnot drunkthe waterfrom theBroad Streetpump.OptionalSkim thepassage andfind theinformation tocomplete theform below.Who WhenWhat HowResultJohn1854helping Examiningthe sourceof all“King CholeraSnowordinary watersupplies andfinding defeatedpeopleexposed newmethods ofdealing withtocholera pollutedwasterStep IIIScanningRead thepassage andnumber theseevents inthe orderthat theyhappened.2John Snowbegan totest twotheories.]An outbreakof cholerahit Londonin

1854.4John Snowmarked thedeaths ona map.7He announcedthat the water carriedthe disease.8John Snowinvestigated twostreets wherethe outbreakwas verysevere.9KingCholerawas defeated.10He foundthat mostof thedeaths werenear awater pump.11He hadthe handleremoved fromthe waterpump.Step IVMain ideaand correctstageRead thepassage andput thecorrect stagesinto thereading aboutresearch intoa disease.JohnSnowDefeats KingCholera^^Paragraph StagesGeneral ideasFindaproblem:The causesof cholera1What causethe choleraMakeupaquestion:Which isThecorrect orpossible theory2rightThink ofa method:Test twoCollect dataon wherepeople wereill anddied and3theory wherethey gottheir waterPlotinformation ona mapto findout wherepeopleCollect results:4died ordid notdieMark thedeathLook into the watertoseeif thatisthe causeoftheAnalyze theresults:5illnessFind theresource ofthewater6Find supportingevidence Findother evidencesto confirmhis conclusionDrawaconclusionThe polluteddirty sourceof drinkingwater wasto7blame forthe causeoftheLondon choleraStepV GroupdiscussionAnswer thequestions Finishexercise2on Page

31.JohnSnowbelieved Idea2was right.How didhe finallyprove itJohnSnow finallyproved hisidea becausehe foundan outbreakthat wasclearly relatedtocholera,collected informationand wasable totie casesoutside thearea tothe pollutedwater.

2.Do youthink JohnSnow wouldhave solvedthis problemwithout themapNo.The maphelped JohnSnow organizehis ideas.He wasable toidentify thosehouseholdsthat hadhad manydeaths andcheck theirwater-drinking habits.He identifiedthose housesthat hadhadno deathsand surveyedtheir drinkinghabits.The evidenceclearly pointedtothepolluted waterbeingthecause.

3.Choleraisa19th centurydisease.What diseasedoyouthink issimilar tocholera todayTwodiseases,which aresimilar today,are SARSand AIDSbecause theyare bothserious,havean unknowncause andneed publichealthcaretosolvethem.Step VIUsing thestages forscientificresearchand writea summary.。