POWERWINDInformationalTextPAIREDREADASolarHousebyAnnWeilSTRATEGIES&SKILLSAComprehensionStrategy:RereadSkill:Author’sPurposePhonicsCVCesyllablesVocabularyStrategyParagraphCluesVocabularyelectricity,energy,flows,haul,power,silent,solar,undergroundContentStandardsSciencePhysicalScienceWordcount:566**PhotographyCredit:CoverRichardNowitz/NationalGeographicSociety/CORBIS**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-118985-4MHID:0-02-118985-4PrintedintheUnitedStates.12345678DOC171615141312PAIREDREADChapter1WhatIsWind?...................2Chapter2Windmills.........................4Chapter3WindmillstoWindFarms..........8Chapter4TheFutureofWindPower........12RespondtoReading...............15ASolarHouse.............16Glossary/Index....................19FocusonScience..........20byAnnWeilEssentialQuestionHowdoweuseenergy?GenreInformationalTextPOWERWINDAboat’smainsailcaptureswindpower.Youcannotseethewind.Butyoucanseewhatitdoes.Windliftsakiteintotheair.Windpushesasailboatacrossthewater.Sailboatsareonewaypeopleusewindpower.PeopleusedsailboatsinancientEgypt.TheysailedalongtheNileRiver.Later,peoplefromEuropeusedsailboatstoexplore.SomesailedtotheAmericas.Somesailedaroundtheworld.CHAPTER1WHATISWIND?Bettmann/CORBIS2Whatiswind?Windismovingair.Movingthingshaveenergy.Windgetsenergyfromthesun.First,thesunwarmstheair.Thenthewarmairrises.Coolairmovesintotakeitsplace.Thatmovingairiswind.STOPANDCHECKWhathaveyoulearnedaboutwindpowersofar?Airoverlandwarmsfasterthanairoverwater.CoolairWarmairIllustration:RobS...
