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Water Water Everywhere

Water Water Everywhere. The Water Molecule. H 2 O. Water. Colourless Odourless Tasteless liquid WHEN PURE!! ( Minerals in water give it taste). Water.

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Water Water Everywhere

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  1. WaterWaterEverywhere

  2. TheWaterMolecule • H2O

  3. Water • Colourless • Odourless • Tastelessliquid WHEN PURE!! • (Minerals in watergiveit taste)

  4. Water • Waterontheplanetisfound in the seas and oceans, rivers, lakes, undergroundaquifers, and frozen in glaciers and the polar ice caps. • Waterisessentialonearthforthesurvival of life. All living organismsneedwatertosurvive.

  5. Properties of Water • Water has a boilingtemperature of 100 degreescelsius, and a freezingpoint of 0 degreescelsius. • Whenwaterfreezesitexpands, so it’svolumeischangingbutnotitsmass. Thismeansthat ice is LESS dense thanwater. Thisiswhy ice floats in water.

  6. Properties of Water • Wateris a goodsolvent • Thismeansthatwaterisgood at dissolvingsubstances, likethemineralscalcium and magnesiumand gases likeoxygen • Thisisreallyimportantforfish!!!

  7. Properties of Water • Water has a highsurfacetension • Thisiswhatcreatesthemeniscus in glass, whyraindrops are so big and whyinsects can walkonthesurface of water. • Watermoleculeshave a highattractiontooneanother, they are alwayspullingtowardseachother. Theseforcesholdthemoleculesclosetoeachother.

  8. WaterDistribution

  9. Waterdistribution • Someparts of theworldsufferseverewatershortages

  10. Water Uses

  11. REMEMBER!! • Actual waterusage and virtual waterusage are NOT thesame! • Virtual waterusageismuchhigher! It’sthefoodonyourtable and theclothesonyour back!

  12. WaterCycle • Basedonthechangingstates of water • Evaporation • Condensation • Precipitation • Freezing • Melting

  13. WaterCycle

  14. Tides • Thetides are causedbythegravitationalpull of themoonontheearth (and less so thesun)

  15. Currents • Thecurrents of theworld are anexplication of howtheoceansmove. • There are warmcurrents and coldcurrents, and these can changetheclimate of anareaor cause extreme weather (eg. Irelandbeingwarmerthanitshould be and El Niño in S. America)

  16. Currents

  17. WaterTreatment • Waterneedsto be cleanedbeforeit can be consumedbyhumans. • Thenafter use in homes and businesses, itneedsto be cleaned once againbeforeit can be returnedto natural waterslikerivers, lakes and the sea. • See: http://www.skoool.ie/content/skoool_learning/junior/lessons/science/water_solutions/flash/h-frame-ns6.htm

  18. WaterHardness • Waterhardnessisdowntothepresence of Calcium and Magnesiumions in thewater. • The more of theseionsthere are, theharderthewater. • Hardwater can cause damagetokettles, washing machines and otherappliancesthat use water.

  19. WaterHardness • Hardwaterdoesnotform a lather (bubbles) easily • Hardwaterdependsonthetype of rock thatthewatter has come intocontactwith. • Ifyouhavehardwater in yourhouse, itisbecausethere are rocksundergroundwhichcontain a lot of calcium and magnesium. • Thewaterpassesovertheserocks and dissolvestheminerals

  20. WaterShortages • 1.2 billionpeople in theworldtoday do nothaveaccesstocleandrinkingwater. • 3.4 millionpeople die eachyearbecause of water borne diseases • 1/3 of theworldspopulationwilllive in anarea of extreme watershortagesbytheyear 2025 • VIDEO Blue Gold: TheWorldWaterWars • ResearchWaterShortagefacts and thinkabouthowit can effectyourlife.

  21. WaterShortages • How can water be saved? • Reasearchwhat can be done to reduce waterusage • Look into real examples of waterdepletionlikein theAral Sea

  22. WaterPollution • Waterpollution can come frommanysources: • Acid rain frompollution of theatmosphere • Agriculture • Factories and Industry • Pollutedwaterfromhomes and businesses • ResearchONE of theabovefortheexam

  23. How can wefightwaterpollution?

  24. Resourcestostudy • Skoool.ie (link onslide 17) • Videos onyoutube • Your notes fromclass • Educaline (youdon’tneedthescientificequations) • NationalGeographic has somegreatinfoaboutwater

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