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ID:57132631
大小:8.52 MB
页数:15页
时间:2020-08-01
《有趣的海洋生物世界-兼修英语课件.ppt》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、Soyouwanttostudymarinebiology?有趣的海洋生物IntroductiontoMarineBiologyPhysicalOceanography–Waves,Tides,OceanCirculation,Seawater,andSurfing?IntroductiontoMarineBiologyMarineBiology-SpeciesDiversityIntroductiontoMarineBiologyMarineBiology–Habitats,Ecology,andInteractionwiththeenvironmentIntroduct
2、iontoMarineBiologyAfewgeneralconcepts…EvolutionastheunifyingtheoryofbiologyDarwin’stheoryofevolutionbynaturalselection:1.Geneticvariation2.Inheritanceofvariationbyoffspring3.Naturalselection–Selectsforadaptationsthatenhancea)survivalb)reproductionSourcesofVariation?1.Mutations–mostdestruct
3、ive,but…2.Sexualreproduction-IntroductiontoMarineBiologyAfewgeneralconcepts…Thescientificmethod-Howdothingswork?Steps:1.Observation2.Hypothesis3.Experiment4.ConclusionTestedhypothesis>>>>>>>>>>>>>>>>>>>>>>>Theory!!Otherthingstoconsider:1.Controls2.SamplesizesAtmosphericcirculationDifferent
4、partsoftheearthareheatedbythesunatdifferentrates.Equatorialregionsareexposedtomoredirectsunlightandarethereforeheatedmorethanthehigherlatitudes.AtmosphericcirculationNotethatthedifferentialheatingoftheequatorialregionsrelativetothepolesresultsinthetemperaturedifferencewithlatitude,butdoesn
5、otexplain“seasons”.Seasonsareafunctionofthetiltedaxisoftheearth...AtmosphericcirculationWhathappenstoairasitheatsuporcoolsdown?Aconvectioncurrentisformed.AtmosphericcirculationSamethinghappenstotheearth!!AtmosphericcirculationButthingsarenotsosimpleonearth…theearthrotates…whatistheeffectof
6、therotation?TheCoriolisEffect-Thetendencyofanyobjectmovingfreelyacrosstheglobetoappeartocurvetotherightinthenorthernhemisphere,andtotheleftinthesouthernhemisphere.Reason?–hastodowithdifferencesinthecross-sectionalcircumferenceoftheearthasafunctionoflatitude…Canyouthinkofdemonstrationstosee
7、howthismightwork?AtmosphericcirculationSowhatistheresultofthecorioliseffectontheatmosphericcirculationoftheearth?Whatotherfactorscanyouthinkofthatwouldinfluenceatmosphericcirculation?AtmosphericcirculationWhatotherfactorscanyouthinkofthatwouldinfluenceatmosphe
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