Whatisacoral课件

播放影片，althoughtheylookalittlelikeplantsHowdoesacoralreefform?Whenacoraldies，itsshellremains，isn’tit?EverythingisbeautifuldownhereButdon’tgetstaringeyeinthiswonderlandYou’vegottowatchout，marineanimalwithoutabackboneCoralssupporttheirsoftbodieswithinhollow“shells”ofbonelikematerial点击画面，Acoralreefisafantasticworld，Ifyouthinkthatcoralisatypeofrock，thereisdangerwhereyouareleastexpectedEventhecoralreefitselfcanbeprettytreacherous点击画面，youareonlypartiallyrightThathardsubstancethatlandlubberscallcoralisthehardcoveringcreatedbymillionsoftinycoralswhichareanimals，播放影片，sizesandcolours，Whatisacoral?Acoralisasmall，andothercoralsgrowonitOvermillionsofyearspilesofremainsbecomehardunderwaterrocks---thereefsCoralshavemanyshapes，andreefscanlooklikebeautifulunderwatergardens点击画面，播放影片，CoralreefsarecolorfulmysteriousandfragileworldsWeneedtoprotectthemnowsothepeopleandseacreaturescanenjoythesespecialplacesinfutureWhatistheGreatBarrieReef?TheGreatBarrieReefisaseriesofsmallcoralislandsin，