POWERWINDInformationalTextbyAnnWeilPAIREDREADASolarHouseSTRATEGIES&SKILLSAPhotographyCredit:CoverRichardNowitz/NationalGeographicSociety/CORBIS**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:RereadSkill:Author’sPurposePhonicsCVCesyllablesVocabularyStrategyParagraphCluesVocabularyelectricity,energy,flows,haul,power,silent,solar,undergroundContentStandardsSciencePhysicalScienceWordcount:1,165**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-118794-2MHID:0-02-118794-0PrintedintheUnitedStates.12345678DOC171615141312POWERWINDPAIREDREADChapter1WhatIsWind?........................2Chapter2Windmills.............................4Chapter3WindmillstoWindFarms............8Chapter4TheFutureofWindPower..........12RespondtoReading.................15ASolarHouse...............16Glossary/Index.......................19FocusonScience.............20byAnnWeilEssentialQuestionHowdoweuseenergy?Themainsailcaptureswindenergytomovethesailboat.Haveyoueverbeenoutsideonawindyday?Whatdidthewindfeellike?Couldyoufeelitpushagainstyouasyouwalked?Thewindcanblowaleafoffatree,keepakiteinthesky,orevenpushasailboat.Forthousandsofyears,peoplehaveusedwindpowertosailacrossriversandseas.PeoplehadsailboatsinancientEgypt.TheysailedupanddowntheNileRiver.Theywouldloadtheirsailboatswithgoodsandcarrythemdowntheriver.Later,peoplesetsailfromEurope.Theysailedacrosstheoceans.Theydiscoverednewplaces,includingtheAmericas.SomepeopleevenusedsailboatstotravelaroundtheworldCHAPTER1WHATISWIND?Bettmann/CORBIS22Energyfromthesunwarmstheairoverlandmorequicklythantheairov...
