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Download Homework: Photosynthesis HW-34 - Garnet Valley School District
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Be your best. HW-34 CellBiologist’sName:_________________________________Period:___Date:______________ Mrs.Bouchard-7thGradeScience Homework:Photosynthesis Direc&ons:Readthefollowingtextandanswertheques&ons. Chloroplasts Photosynthesisisaprocessinwhichsunlightenergyisusedtomakeglucose.Thesiteof photosynthesisisinthechloroplast–anorganellefoundintheleavesofgreenplants.Themain func;onsofchloroplastsaretoproducefood(glucose)duringphotosynthesis,andtostorefood energy.Chloroplastscontainthepigment,chlorophyll.Chlorophyllabsorbsmostofthecolorsin thecolorspectrum,andreflectsonlygreenandyellowwavelengthsoflight.Thisiswhywesee leavesasgreenoryellow–becausethesecolorsarereflectedintooureyes. Whatisphotosynthesis?______________________________________________________ _________________________________________________________________________ Wheredoesphotosynthesisoccur?______________________________________________ Whatarechloroplastsandwherearetheyfound?___________________________________ _________________________________________________________________________ Whatarethetwomainfunc;onsofchloroplasts?___________________________________ Whydoemostleavesappeargreen?_____________________________________________ Whatistheprimarypigmentfoundinthechloroplast?________________________________ Photosynthesis Glucoseisanothernameforsugar.ThemolecularformulaforglucoseisC6H12O6.Plantsmake sugarbyusingtheenergyfromsunlighttotransformCO2fromtheairwithwaterfromthe groundintoglucose.Thisprocess,calledphotosynthesisoccursinthechloroplastoftheplant cell.Duringthisprocess,oxygen(O2)iscreatedasawasteproductandisreleasedintotheairfor ustobreath.Theformulaforphotosynthesisis: (reactants) (products) CO2+H2O+sunlight---->C6H12O6+O2 Thisformulasaysthatcarbondioxide+watermoleculesarecombinedwiththeenergyfrom sunlighttoproducesugarandoxygen.Thereactantsinphotosynthesis(whatisused)areCO2, waterandsun.Theplantgetswaterfromthegroundthroughitsroots.Theplantcollectscarbon dioxidefromtheair.Muchofthecarbondioxidecomesfromlivingorganismsthatexhale (breathitout)it,butsomealsocomesfromfactorysmokestacksandcarfumes. Whatistheformulaforphotosynthesis? _______________________________________________________________________________ _
