unit4 astronomy

《unit4 astronomy》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit4Astronomy:thescienceofthestars(warmingupandreading)Goals1.toenablethestudentstotalkaboutAstronomyandoriginoflifeonearth.2.toimprovethestudents’readingablitiesofscanningandskimming-Lead-inquestionstothetopicofthisunit1.InoursolarsystemeightplanetscirclearoundthesunWhataretheirnames

2、?2.Doyouknowanyquestionsthatastronomersareinterestedin?Pre-reading1.Theoriginoflifeonearthisaquestionthatinterestsastronomers.Whatdoyouknowaboutit?2.Thereareseveralideasabouttheoriginoflifeonearthandtheideainourpassageisonlyoneofthem.ReadingI.Readthepassagecarefullyandmatchthemainideaw

3、itheachparagraph.Para.1Theformation(形成)oftheearth.Para.2Theimportanceofwaterforlife.Para.3Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4Thearrivalofhumansandtheirimpactontheearth.Para.5Thedevelopmentofplantsandanimalsontheearth.2.Thinkaboutwhatyouhavereadanddiscusstheseques

4、tionsinpairs.1.Whatarethethreefundamentalelementsforushumanbeingstosurviveontheearth?2.Whywastheearthdifferentfromotherplanets?3.Whydoscientiststhinktherehasneverbeenlifeonthemoon?4.Whydidgreenplantshelplifetodevelop?5.Thereusedtobenineplanetsinthesolarsystem.Recentlyscientistshavedeci

5、dedthatoneofthemcannolongerbeconsideredaplanet.Doyouknowthenameofthatplanet?Doyouknowwhytheyremovedit?6.Whatproblemiscausedbyhumanbeings?Post-readingWorkingroupsanddiscusswhatimpacthumanbeingshaveonearth.,suchasglobalwarming.andgetthemtotalkaboutthecausesofglobalwarming.Unit4languagepo

6、intsGoals1.tomasterthefollowingwordsandexpressions:intime;unlike;multiply;inturn;prevent…from;exist;puzzle;atmosphere;nowthat.2.toenablethestudentstoanalyseandunderstandcomplexsentencesespeciallynounclauses观察intime的用法并总结Theywereintimetoproducethewater..().I’llseehimintime.()Shewillbeba

7、ckintimetopreparedinner.()与time相关的短语:innotime()attimes()atatime()onceuponatime()ontime()atonetime()forthetimebeingfromtimetotime()atnotime()阅读下面句子,注意prevent...from的意思和用法。Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.想一想还有其他表达方式