Chapter 13 Packet - North Allegheny School District ... circuit magnetism magnetic field...
Transcript of Chapter 13 Packet - North Allegheny School District ... circuit magnetism magnetic field...
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Name:________________________________
Section:_____
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Vocabulary
Word Definition
staticelectricity
electriccurrent
resistance
seriescircuit
parallelcircuit
magnetism
magneticfield
electromagnet
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Lesson1–Howdoesmatterbecomecharged?Page374-3771.Whatcausesathundercloudtomakelightning,andsockstoclinginthedryer?2.Whatarethebuildingblocksofmatter?3.Whatcausesstaticelectricity?4.Whatdomovingchargesgenerate?
5.Whathappenswhenpositiveandnegativechargesonobjectsthatareclosetoeachotherarenotbalanced?6.Givetwoexamplesofstaticelectricity.7.Iftwochargeshaveoppositecharges–onepositiveandonenegative–whatwilltheydo?8.Anelectricforceis_____________________________________________________
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9.Howdoobjectswiththesamechargebehavedifferentlythanobjectswithoppositecharges?10.Whatwouldhappenifanegativelychargedballoonwerehungnexttoanothernegativelychargedballoon?
11.Apositivelychargedobject(repels/attracts)apositivelychargedobjectWhatisanelectricfield?12.Canyouseeanelectricfield?
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Lesson2–Howdoelectricchargesflow?Page378-3811.Mostelectricityisonthego.Anelectricchargeinmotioniscalled______________________2.Whatisaclosedcircuit?3.Whatisanopencircuit?4.Materialsthatbecomechargedmoreeasilyarecalled_________________________5.Listsomeexamplesofconductors6.MaterialsthataremadeofatomsthatDONOTbecomechargedeasilyarecalled___________________7.Listsomeexamplesofinsulators
8.Howdoesaresistorhelpanelectricheaterwork?9.Whathappenstoanelectriccurrentataswitch?
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10.Inaseriescircuit,electricchargecanflow_____________________________11.Anybulbalongthepathofaseriescircuitreceives_______________amountofelectricalenergy.
12.Inthiscircuit,whatwouldhappentotheotherlightbulbsinthecircuitifonebulbburnsout?
13.A_______________________circuithastwoormorepathsfortheelectricchargetofollow.14.Howmanypathsareinaparallelcircuit?15.Whatisthemaindifferencebetweenaseriescircuitandaparallelcircuit?16.Domodernhomesuseelectricitythatisarrangedinseriesorinparallelcircuits?Why?
DrawthecircuitsymbolsSwitch
EnergySource
Resistor
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Lesson3–Whataremagneticfields?Page382-3851.Amagnetis____________________________________________________________________2.________________________istheforcethatactsonmovingelectricchargeandmagneticmaterialsthatarenearamagnet.3.Whatisthestructureofamagnet?
4.Whatarethesimilaritiesanddifferencesbetweenthenorthandsouthpolesofamagnet?5.Explainwhathappenstoamagnet’spolesifamagnetisbrokenintotwoparts.Whatpoleswillseekeachotheronthetwomagnetparts?6.Whereisamagneticfieldthestrongest?
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7.WhataresomewaysthatEarthislikeamagnet?
8.Explainhowacompassworks?
9.Whydoesacompassneedlepointinanorth-southdirection?10.WhereareEarth’smagneticforcesstrongest?
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Lesson4–Howiselectricitytransformedtomagnetism?Page386-3891.Howareelectricityandmagnetismrelated?2.Whatsequenceofeventswilltakeplacewhenacompassislocatednearawireandanelectriccurrentflowsthroughthewire?
3.Whatisanelectromagnet?4.Whatisproducedwhenacoiledwireisspunaroundamagnet?5.Howcanthestrengthofanelectromagnetbeincreased?
6.Howisanelectromagnetdifferentfromamagnet?
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7.Whatarethreewayselectromagnetsareused?8.Inadoorbell,electromagnetshelpconvert___________________________________to
_______________________________________to___________________-_______________________.
9.Wouldadoorbellstillworkduringapoweroutage?Whyorwhynot?10.Inthepicture,labeltheelectromagnet.11.Whyareelectromagnetsusedinsomanyelectronicdevices?
***DIDYOUKNOW...AnMRIusespowerfulmagnetsandradiowavestoconstructpicturesofthebody?
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Lesson5–Howismagnetismtransformedtoelectricity?Page390-3931.Describehowelectricityisgenerated.
2.Whataretwowaystoincreasetheamountofelectriccurrentproducedbyamagnet?3.Howdoesthenumberofcoiledloopsaffectthestrengthofthecurrent?
4.WhatimportantinformationdidMichaelFaradaycontributetoscienceinthe1831?5.WhatwasdifferentaboutFaraday’sdiscoveriesandHenry’sdiscoveries?6.WhatisasignificantdifferencebetweenthedynamothatFaradayinventedandamoderngenerator?7.Wheredomosthomes,schools,andbusinessesgetelectricity?
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8.Describehowageneratorworks.
9.Explaintherolemagnetsplayinhelpinggeneratorscreateelectricity.10.Listtwosourcesofenergythatgeneratorsusetocreateelectricity.11.Whatarethe4R’sofelectricalsafety?
12.Whataresomecommonelectricitemsthatmustbeusedcarefully?13.Whatdoyouthinkwillbethenextimportantdiscoveryorinventionaboutelectricity?
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1.Ifchargedparticlesinanobjectarenotbalanced,theobjectbuildsup________________________________.2.Achargeinmotioniscalleda(n)_________________.3.____________________isthepushingorpullingforcethatexistswhenamagneticmaterialisnear.4.Currentflowsinonlyonedirectionsina(n)______________________________________________.5.Thequalityof__________________opposestheflowofelectriccurrentthroughamaterial.6.BecauseofEarth’s________________________,acompassneedlepointsinanorth-southdirection.
7.Oneadvantageofa(n)___________________overanaturalmagnetisthatitsmagneticfieldcanbeturnedoff.8.A(n)___________________canhandleappliancesthatusedifferentamountsofelectriccurrent.
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FillintheblankApositivelychargedobject____________________anotherpositivelychargedobject.Amagneticfieldisthestrongestat___________________________Amaterialthatconductselectriccurrentpoorlyiscalled_________________________Amaterialthatconductselectriccurrentwelliscalled__________________________Inadoorbell,electromagnetshelpconvert_________________________________to
________________________________to______________________________-_____________.
Whenacoiledwireisspunaroundamagnet_______________________isproduced.
ConstructedResponseWhydomosthomeshaveparallelcircuitsratherthanseriescircuits?Howcanthestrengthofanelectromagnetbeincreased?Whathappenstoamagnet’spolesifamagnetisbrokenintotwoparts?