Science 9 Unit 4: Electricity Reading Logs – …...Science 9 Unit 4: Electricity Reading Logs –...
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Science 9 Unit 4: Electricity Reading Logs – SCIENCE in ACTION Topic # Topic Title Science in Action Page Due Complete ✔ or X 1.1 Static Electricity 271-278 1.2 Current Electricity 279-283 1.3 Electrical Safety 284-287 1.4 Cells and Batteries 288-294 2.1 Controlling the flow of electrical current 296-303 2.2 Modeling and measuring electricity 304-310 2.3 Analyzing and building electrical circuits 311-316 3.1 Energy forms and transformations 318-323 3.2 Energy transformations involving electrical and mechanical energy 324-331 3.3 Measuring energy input and output 332-338 3.4 Reducing the energy wasted by devices 339-342 4.1 Electrical energy sources and alternatives 344-350 4.2 Electricity and the environment 351-353 4.3 Electrical technology and society 354-358 Review 360-365
Transcript of Science 9 Unit 4: Electricity Reading Logs – …...Science 9 Unit 4: Electricity Reading Logs –...
Science9Unit4:ElectricityReadingLogs–SCIENCEinACTION
Topic# TopicTitle ScienceinActionPage Due Complete
✔ orX1.1 StaticElectricity
271-278
1.2 CurrentElectricity 279-283
1.3 ElectricalSafety 284-287
1.4 CellsandBatteries 288-294
2.1 Controllingtheflowofelectricalcurrent 296-303
2.2 Modelingandmeasuringelectricity 304-310
2.3 Analyzingandbuildingelectricalcircuits 311-316
3.1 Energyformsandtransformations 318-323
3.2Energytransformationsinvolvingelectricalandmechanicalenergy
324-331
3.3 Measuringenergyinputandoutput 332-338
3.4 Reducingtheenergywastedbydevices 339-342
4.1 Electricalenergysourcesandalternatives 344-350
4.2 Electricityandtheenvironment 351-353
4.3 Electricaltechnologyandsociety 354-358
Review
360-365
21.0 –Electricalenergycanbetransferredandstored.
1.1 –StaticElectricityDrawanatomincludingProtons,NeutronsandElectronsandclearlyindicateparticlecharges.Whenthenumberofprotonsandelectronsareequal,themoleculeis_______________.Oppositecharges______________________Likecharges__________________________DefinethefollowingusingwordsANDpictures
StaticCharge
ChargeSeparation
ElectricalDischarge
VandeGraaffGenerator
31.2–CurrentElectricity
Staticchargesdonotworkverywellforoperatingelectricaldevices.Electricalcurrentisproducedwhenchargesmoveinacontinuousflow.Anelectricalcurrentflows____________________________________until__________________________.Therateatwhichcurrentflowsismeasuredin__________________called__________forshortandshownby(A).Thesearenamedafter_______________________________.Themeasureoftheamountofelectricalenergycarriedbyeachparticleisknownas__________________________.Thisisalsoknownasthe“potentialdifference”.Theunitformeasuringelectricalenergycarriedbyeachparticleisknownasthe_____________andshownby(V).
Whenanobjectbuildsupmoreofonetypeofchargedparticleitissaidtohavea___________________________________________.“Static”meansnotmoving.Inthiscasetheelectronsarebuildingupandnotflowing.
Ifchargedparticlesflowratherthanbuildupitiscalledan___________________________________.Thishasatleast2requirements:1.2.
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1.3–ElectricalSafetyAnypersoncomingincontactwithapowerlinemaycreateanunintendedpathfortheelectricity.Suchapathiscalleda________________________because________________________________________________________.WhenitcomestoelectricalsafetyshouldyoubemoreconcernedaboutVoltsorAmps?Explainyouranswer:
Writethedefinitionofaninsulatorandgive4differentexamples:List5ElectricalSafetyPointers:-----Explainhowafuseandcircuitbreakerbothworktokeepyousafe.Explainhowafuseisdifferentthanacircuitbreaker(includepictures)!
51.3:ConnectyourUnderstanding
A. Apowerlinecarryinghighamountsofcurrentfallsonacar,butthepeopleinsidearenotelectrocuted.Explain.
B. Areallelectricshockstothebodydangerous?Explain.
C. Tallbuildingsoftenhaveasteel-lighteningrodthatisconnectedtothegroundwithawire.Lighteningtendstostriketheserodsduringstorms.Whyaretheserodsaddedandhowdotheywork?
D. Younoticeafriendremovingthethirdprongofaplugsothattheplugwillfitintoanextensioncordthathasonlytwoholds.Istheremovalofthisthirdprongsafe?Explainwhyorwhynot?
E. Drawasymbolyoumightseerepresentinganelectricalhazard.
61.4:CellsandBatteriesTheelectricity-producingcellsthatweuseeverydayinflashlightsandportableradiosare____________________.Thechemicalsinsideareapaste.Thechemicalreactionreleasesfreeelectrons.LabelthepartsoftheDryCellbelow:WetCells–Drawasimplewetcellinthespacebelow.Besuretolabelyourelectrodesaspositiveornegativeandindicatechargedirection.
A.B.C.D.E.F.
Awetcellusesaliquidelectrolytethatisusuallyan____________.Wetcellsaregenerallycheaperandeasiertomakethandrycellsbutwedon’tusethemascommonlytodaybecause:_______________________.Acommonexampleofawetcellwedouseeverydayis:________________________________
7WriteadefinitionandgiveanEXAMPLEofthefollowing:PrimaryCell:SecondaryCell:Electrolysis:Electroplating:Whatisthedifferencebetweenabatteryandacell?UsepicturesANDwordstodemonstrateyourunderstanding.Whomadethefirstpracticalbattery?_________________________________ComprehensionQuestions:
1. Acardesignerhasproposedanewcarbattery.Sheisplanningtotestthefollowingdifferentelectrodecombinations:
a. bothzincb. zincandcopperc. bothcopperd. zincandcarbone. bothcarbon
Willallthesecombinationswork?Explainwhyorwhynot?
2. Computercircuitscanbedamagedbystaticdischarges.Topreventthis,techniciansusuallywearananti-staticstrapthatisconnectedtothemetalcaseofthecomputer.Explainhowwearingsuchastrapprotectscomputercircuits.
82.0–Technologiescanbeusedtotransferandcontrolelectricalenergy.2.1–ControllingtheflowofelectricalcurrentIntheboxesbelowuse+symbolstorepresentnucleiand–symbolstorepresentelectronsanddemonstratehowtheybehaveininsulators,conductorsandconductorswithvoltageapplied.
Insulator Conductor–novoltage Conductor–voltageappliedDefinesuperconductors,giveanexampleandthenameofthescientistwhodiscoveredthem:
Completethefollowingtable Definition Measuredin: Symbol
Resistance
Ohms
Voltage
V
Current
Amperes
Howisapolygraphanapplicationofresistance?
Whatisthedifferencebetweenaswitchandarheostat(avariableresistor)?
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2.2-ModelingandmeasuringelectricityUsingtheanalogyofflowingwaterclearlydescribevoltage,resistanceandcurrentusingwordsANDpictures.RewriteOhm’sLawtomeasureeachofthefollowing:Voltage Current Resistance2.3-AnalyzingandbuildingelectricalcircuitsListthe4partsofacircuit Drawathesepartsinasimplecircuit1.2.3.4.Drawanddescribeaseriescircuit. Drawanddescribeaparallelcircuit
103.0–Devicesandsystemsconvertenergywithvaryingefficiencies3.1EnergyFormsandTransformationsUsewordsANDpicturestodefinethefollowingterms
Completethechart.Writethedescriptioninyourownwords!
EnergyForm Description Example
Explainhowenergycanbetransformedandgivetwoexamplesofdevicesthatcanbeused.
3.2EnergyTransformationsInvolvingElectricalandMechanicalEnergyWhatisOersted’sLaw?
Energy Thermocouple
11Foreachofthedevicesshownbelowrecordwhoiscreditedwiththeirdiscovery,howtheyworkandhowtheycontributedtodevicesweusetoday.
Howdothefollowingcontributetoelectricmotors?
Definethefollowingtermsinyourownwordsanddrawadiagramifithelpsyoutounderstand.
Commutator
Armature
Electromagnet
AlternatingCurrentDirectCurrent
Transformer
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143.3MeasuringEnergyInputandOutput
Thefasteradeviceconvertsenergy,the_________________itspowerrating.
Giveatypicalpowerratingforeachofthefollowingsmallappliances(hint,youmightneedtolookituponline):Electricalstove________ Calculator_____________ CurlingIron__________WhatisaKilowattHour(inyourownwords)?
ExplainhowtheLawofConservationofEnergyandEfficiencyofelectricaldevicesarerelated.
Formula
POWER
Energy Consumption
Formula
15Efficiencyistheratiooftheusefulenergyoutputtothetotalenergyinputinadevice.3.2and3.3ReviewYouprobablywanttocarefullyshowformulaandstepsforsolvingsothiscouldhelpyouinyourElectricityfinalJ
1. Howmuchenergyisusedifyouleavea60Wlightbulbonfor10minutes?
2. Howmuchenergyisusedifyouleavea100Wlightbulbonfor10minutes?
3. Electricalcompaniesmeasuretheamountofenergyusedinkilowatthours(kWh)insteadofW/s.Howmuchenergydoesafridgeandstoveusein1dayinkWh(usethetableabovefortherequiredvalues)?
4. Whatisthepowerratingofatoasterthatrequires10Aofcurrent,whenpluggedintoa120Velectricaloutlet?
5. Ahairdryerhasapowerratingof1000W.Thehairdryerispluggedintoa120Voutlet.Howmuchcurrentflowsthroughthehairdryer?
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3.4ReducingtheEnergyWastedbyDevicesExplainthenumberedcomponentsontheENERGUIDE
1.2.3.4.
Explainwhyanelectricmotorismoreenergyefficientthanacombustionengine.Giveatleast3reasons.
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4.1–ElectricalenergysourcesandalternativesCompletethefollowingtable:
EnergySources Description Pros ConsFossilFuels
18Whatisthedifferencebetweenrenewableandnon-renewableenergysources?(themorespecificyouarethebetteritwillbeforyou)
4.2–ElectricityandtheenvironmentDefineby-productwithrespecttoelectricitygeneration:_______________________________________________________________________________________________________Whatharmfulby-productsresultfromelectricalgenerationandhowdotheyaffecttheenvironment?
Whatdoessustainabilitymean?___________________________________________________________________________________________________________________________4.3–Electricaltechnologyandsociety
ElectricalTechnologiesBenefits
1.2.3.
Disadvantages
1.2.3.
