PAIREDREADZachtheMartianExpositoryTextMARSBYYVONNEMORRINSTRATEGIES&SKILLSAPhotographyCredit:StockTrek/Photodisc/GettyImages**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.WordCount:1,736**ComprehensionStrategy:AskandAnswerQuestionsSkill:CauseandEffectVocabularyStrategyGreekRootsVocabularyapproximately,astronomical,calculation,criteria,diameter,evaluate,orbit,sphereContentStandardsScienceEarthandSpaceScienceCopyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119249-6MHID:0-02-119249-9PrintedintheUnitedStates.123456789DOC151413121110PAIREDREADIntroduction.................................2Chapter1DiscoveringMars.............................4Chapter2OrbitingandRoving.........................10Chapter3LifeonMars?...............................13Conclusion..................................17RespondtoReading........................18ZachtheMartian..................19Glossary....................................22Index.......................................23FocusonScience..................24EssentialQuestionHowcanscientificknowledgechangeovertime?MARSBYYVONNEMORRINWeknowMarsastheredplanet.Throughouthistory,peoplehavebeenfascinatedbyMars.Ancientpeopleobservedapointofredlightintheskyandwonderedwhatitmightbe.Unlikethestars,whichwerewhiteandappearedtomoveinanarceverynight,thisredlightwanderedaroundthesky.TheancientEgyptianscalledthelightHerDesher,meaning“theredone.”TheRomanscalleditMars,aftertheirgodofwar.Perhapsitsredcolorremindedthemofthebloodofbattle.Earlyscientistsobservedtheplanet’smovement.LaterastronomersdiscoveredmoreaboutMarsusingte...
