ExpositoryTextPAIREDREADZachtheMartianMARSBYYVONNEMORRINSTRATEGIES&SKILLSAComprehensionStrategy:AskandAnswerQuestionsSkill:CauseandEffectVocabularyStrategyGreekRootsVocabularyapproximately,astronomical,calculation,criteria,diameter,evaluate,orbit,sphereContentStandardsScienceEarthandSpaceScienceWordCount:2,381**PhotographyCredit:StockTrek/Photodisc/GettyImages**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119097-3MHID:0-02-119097-6PrintedintheUnitedStates.123456789DOC151413121110MARSBYYVONNEMORRINPAIREDREADIntroduction.................................2Chapter1DiscoveringMars..............................4Chapter2OrbitingandRoving..........................10Chapter3LifeonMars?................................13Conclusion..................................17RespondtoReading.........................18ZachtheMartian...................19Glossary....................................22Index.......................................23FocusonScience....................24EssentialQuestionHowcanscientificknowledgechangeovertime?TheIndianscalledMarsAngaraka,whichmeans“burningcoal,”andtheArabscalleditMirikh,meaning“thetorch.”INTRODUCTIONThroughouthistory,peoplehavebeenfascinatedbytheplanetMars.Inancienttimes,peopleobservedapointofredlightthathoveredinthesky,andtheywonderedwhatitmightbe.Unlikethestars,whichwerewhiteandappearedtomoveinanarceverynight,thisredlightwanderedaroundthesky.TheancientEgyptianscalledthelightHerDesher,meaning“theredone.”TheGreeksandtheRomansbothcalledtheplanetaftertheirgo...
