ExpositoryTextPAIREDREADZachtheMartianMARSBYYVONNEMORRINSTRATEGIES&SKILLSAPhotographyCredit:StockTrek/Photodisc/GettyImages**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:AskandAnswerQuestionsSkill:CauseandEffectVocabularyStrategyGreekRootsVocabularyapproximately,astronomical,calculation,criteria,diameter,evaluate,orbited,sphereContentStandardsScienceEarthandSpaceScienceWordCount:1,264**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119198-7MHID:0-02-119198-0PrintedintheUnitedStates.123456789DOC151413121110MARSBYYVONNEMORRINPAIREDREADIntroduction.............................2Chapter1DiscoveringMars.........................4Chapter2OrbitingandRoving.....................10Chapter3LifeonMars?...........................13Conclusion..............................17RespondtoReading....................18ZachtheMartian..............19Glossary................................22Index...................................23FocusonScience...............24EssentialQuestionHowcanscientificknowledgechangeovertime?Marsisknownastheredplanet.INTRODUCTIONPeoplehavealwaysbeeninterestedintheplanetMars.Ancientpeoplesawaredlightinthesky.Thisredlightwasdifferentfromthewhitestars.Peoplewonderedwhatitmightbe.TheancientEgyptianscalledtheredlightHerDesher,whichmeans“theredone.”TheRomanscalleditMars,aftertheirgodofwar.AstronomersusedtelescopestolearnmoreaboutMars.However,theystillhadquestions.WhatisMarsmadeof?Howbigisit?Isithotorcold?CouldtherebelifeonMars?Someofthesequestionsarestillunansweredtoday.22StockTrek/Photodisc/GettyImagesMARSA...
