儋州市那大中学杨卫平制作

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1、儋州市那大中学杨卫平制作高二英语课件Unit16lesson62ThePacificOceanTheArcticOceanTheAtlanticOceanTheIndianOceanAsiaNorthAmericaAfricaEuropeSouthAmericaAntarcticOceania1.Howsaltyisthewaterintheocean?√A.3.5%C.25%B.11%2.Whereisthelongestcoralbedintheworld?Itliesoffthenortheastco

2、astofAustralia.3.Howdoesseawaterstayclean?Seaweedsproducevariouschemicalsthatkeeptheseaclean.4.Howmuchoftheearth’ssurfaceissea?A.45%B.56%C.71%√Theearthlooksbluefromthespacebecauseitissofaraway.F2.Onlyafewpeoplehaveseenmuchoftheearth’ssolidsurfacebefore.F3.

3、Altogetherthereareelevenmineralsthatmakeupthesaltwateroftheocean.F4.Chemicalsproducedbyseaweedshelptokeeptheseawaterclean.T5.ThesurfacewateroftheMediterraneaninsummercanreachupto25°C.T6.Accordingtothepassage,ifthesealosesalotofwatertotheair,theremightbepar

4、tsofsaltperthousandofwater.F7.Coralbedscanbeseeneverywhereintheseaallovertheworld.F8.Coralsmustliveincleanwateranddirtywaterwillkillthem.THowsaltyaredifferentlakesandseas?NAMEOceansMediterraneanDeadSeaGreatSaltLake%3.5%3.7—3.9%25%27%SomethingabouttheMedite

5、rranean.LengthWidthTemperatureSalt3,700km1,800km3.7-3.9%25℃-29℃Conditionsforcoral.watertemperatureabove20℃plentyoflightclearwaterwaterdepthoflessthan60meters2.Whereisthesaltiestlakeintheworld?TheGreatSaltLake.1.Whatisthemostfamoussaltlakeintheworld?TheDead

6、Sea3.WhyisthelakecalledTheDeadSea?Becauseveryfewthingscanliveinsuchsaltywater.WhydidtheDeadSeabecomethesaltiestlakeintheworld?mineralsfromthousandsofnaturalspringsandtheRiverJordanlittleraintherenoriverflowingoutofthelake_____fromspace,theearthlooksblue.Th

7、isisbecause_________oftheearth’ssurfaceis_____________vastoceans.Theoceansoftheworldare_______.SeenthirdstwoofmadeupsaltyTheDeadSea,wherethereismerely60mmraininayear____________,isthemostfamoussaltlakeintheworld.ThewateroftheDeadSea_________about250partsof

8、salttoeveryonaveragecontainsthousandpartsofwater,or25%_____weight.Thesaltiestlakeintheworldisthe________________.Hotpartsoftheworldwheretheseaisnotdeephave___________.ThebySaltLakebedsGreatcorallargestcoralbe