下学期Unit13高二英语课件
日期：2010-12-27 12:54
Completethechartbelow1000kg/m3，onecubicmeterofwaterweighsonethousandkilogramThewatermoleculeismadeupoftwohydrogenatomsandoneoxygenatom35‰，35gofdissolvedsolidsandgasesinonekilogramofwatertheamountofenergy，toraisethetemperatureofwaterby1℃(high)DensewatersinksandlessdensewaterispushedtothesurfaceItisgoodforthelivingthingsintheoceantoabsorbnutrientseasilyItmakessaltwaterhavealowerfreezingpointandheavierthanpurewaterItisgoodformarineanimalsandplantstotakeadvantageofthedensityofwaterItisgoodfortheearthtokeepthetemperaturesteadyItaddsenergytothemarineecosystemandmovesnutrientsaroundUnit13 TheWaterPlanet1Whatisthechemicalstructureofwater?Carbon&OxygenNitrogen&OxygenHydrogen&Oxygen2Whatisthefreezingpointofwater?A0℃B100℃C0℉3Whatstateiswaterinatroomtemperature?ALiquidBSolidCGas???4AnicecubecanfloatonwaterIthassomethingtodowithwater’ssalinityBdensityCheatcapacity5Thecoastal，
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