Unit4 Astronomy- the science of star-Warming up Reading教案.doc

Unit4 Astronomy: the science of star-Warming up Reading教案 Unit4 Astrn: the siene f star-aring up ap; Reading教案 H life began n the earth Step ne: aring up Tas 1: sense(常识) f siene Phsis, heistr, bilg（stud f life),gelg(地质学) and atheatis are siene subets Se siene subets ill stud t r re f these subets, fr exaple,the stud f phsis and atheatis is astrn(天学) an u understand the flling bined siene subets 1 phsis +atheatis= astrn 2 gelg+phsis = gephsis（地球物理学） 3 bilg+heistr=biheistr( ) /ediine( ) 4 geplitis （地缘政治学）=_________+_________ biengineering(_____________)=_____________+_______________ tas 2: n sense f bilg------ stud f the grups f life (生命的种类/物种) L at the pitures n the sreen and udge the grups as quil as u an hat is the st iprtant nditin fr life t develp(gr)?(ater, air---xgen) Step t Pre-reading The rld is lie a big fail It’s nderful and lrful beause f different inds f life living tgetherBut h did life begin n the earth? The first questin fr sientists t anser is h ater appeared n the earth? Step three: Reading Tas1: Fast-reading(Para1) 1 hat is the iprtant event(事) t the earth befre the appearane f ater? 2 h is ater iprtant fr the beginning f life? Tas2: Sanning (Para1,2,3) the beginning f aterap; the beginning f life San Para1: the beginning f ater 1the Big Bang 2a lud f dust (bine int) 3a ball/a slid shape (explde) 4ater vapur, xgen,…and ther gas (l dn) ater San Para2,3: the beginning f life (put the int right rder) A insets and aphibians appear Breptiles appear shellfish and ther fish appear Ddinsaurs appear Esall plants gr n the ater Fplants begin t gr n dr land Gaals(inluding huans) appear ater 6______ 7_______ 8_______ 9______ 10______ 11______12______ Tas3:areful-reading 1 h the earth as different after the ater appeared? 2 h did plants gr befre anials? 3 h did anials first appear in the sea nt n the land? 4 hat is the ain differene beteen reptiles and aals? an u give se exaples f aals? Step Fur: perative learning Dissuss the flling questins, a