Module 5 A Lesson in a Lab

module5alessoninalab
introductionandvocabulary教案
period1
teachingaims:
1.tointroducesomegeneralscience.
2.tolearnsomewordsrelatedtothethemeofthismodule.
3.todevelopspeakingabilitybypracticingsayingthenumbers,especiallythefractions.
 importantanddifficultpoints:
1.arousethestudents’interestsandloveinscience.
2.enablethestudentstounderstandsomeelementsaboutthechemistrylab.
3.makethestudentsknowhowtoreadthenumbers.
teachingprocedures:
step1.introduction
activity1
theaimoftheactivityistoaskthestudentstofinishthequizaboutgeneralsciencetoarousetheirinterestinscience.theactivitycanbedoneasfollows:
firstly,askthestudentstogothroughthefollowingthequizandmaketheirchoiceontheirown.
quiz:howmuchdoyouknowaboutgeneralscience?
1.waterexists__________.
(a)asasolid,aliquidandagas    (b)asasolidandaliquidonly
2.whenyouheatametal,itwill___________
(a)expand    (b)contract
3.steelismixtureof_____________.
(a)ironandothersubstances.    (b)ironandoxygen
4._______________oftheearth’ssurfaceiswater.
(a)two-thirds    (b)50%
5.thedistanceofthesunfromtheearthis______________kilometers.
(a)25,500    (b)150,500,500
6.theearthis4.6______________yearsold.
(a)million    (b)billion
7.theearthis______________themoon
(a)twiceaslargeas    (b)forty-ninetimeslargerthan
thenputthestudentsinpairstocomparetheiranswersandcallbacktheanswersfromtheclass.
finallyaskthemtolistentothetapeabouttheabovequizandchecktheiranswers.
answers:1.a;    2.a;    3.a    4.a;     5.b;    6.b;    7.b.
activities2&3
theteachercanpreparesomecardsaboutdifferentthingsfortheclassatfirst.beforeshowingthestudentsthecards,theteachercansaytothewholeclass:thingscanbedividedintothreekinds,natural,man-made,andeithernaturalorman-made,nowi’llshowyousomecardsinmyhand,canyoutellmewhicharenatural,man-madeorboth?
afterthis,theteachercancontinuetosaytothewholetheclass:canyougivesomeexamples? thendividethewholeclassintotwobiggroupstocompete.theteachercanaskthesstospeakoutasmanyexamplesaspossibleandwritedownthewordsinthetableontheblackboardasfollows:共3页，当前第1页123