PAIREDREADZachtheMartianExpositoryTextMARSBYYVONNEMORRINSTRATEGIES&SKILLSAPhotographyCredit:StockTrek/Photodisc/GettyImages**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:AskandAnswerQuestionsSkill:CauseandEffectVocabularyStrategyGreekRootsVocabularyapproximately,astronomical,calculation,criteria,diameter,evaluate,orbited,sphereELLVocabularyconducted,developContentStandardsScienceEarthandSpaceScienceWordCount:1,416**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119141-3MHID:0-02-119141-7PrintedintheUnitedStates.123456789DOC151413121110PAIREDREADIntroduction.................................2Chapter1DiscoveringMars.............................4Chapter2OrbitingandRoving.........................10Chapter3LifeonMars?...............................13Conclusion..................................17RespondtoReading........................18ZachtheMartian..................19Glossary....................................22Index.......................................23FocusonScience..................24EssentialQuestionHowcanscientificknowledgechangeovertime?MARSBYYVONNEMORRINWeknowMarsastheredplanet.TheplanetMarshasalwaysfascinatedpeople.Ancientpeopleobservedaredlightinthesky.Theredlightdidn’tmovelikeastar,whichmovesinanarc.Instead,theredlightmovedallaroundthesky.TheancientEgyptianscalledtheredlightHerDesher,whichmeans“theredone.”TheRomanscalledtheredlightMars.MarswastheRomangodofwar.Later,astronomersusedtelescopestoobserveMars.TheydiscoveredmanythingsaboutMars,buttheystillhadquestions.WhatisMarsmadeof?HowbigisMars?I...
