prac 1-9physics in context

8/9/2019 Prac 1-9Physics in Context

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SCE3105 PHYSICS IN CONTEXT

Practical Investigation Involving PCK (Pedagogical Content Knoledge!o" t#e Pri$ar% Sc#ool Science C&rric&l&$'

Tale O" Contents

PCK To)ic Page

1 Newton’s laws of motion 2-3

2 Buoyancy, floating and sinking 4-5

3 Equilibium and t!emomety "

#e$aed by %& 'an (ing 'ang)cience %e$atment*nstitut #eguuan Batu +intang

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1 $il 2.Practical Investigation Involving PCK (Pedagogical Content Knoledge!o" t#e Pri$ar% Sc#ool Science C&rric&l&$'

PCK 1* +or, and $ac#ines

O-ectives* 'o build a sim$le and com$ound mac!ine&

.aterials/

*nclined $lane, load, $ulley and block of wood

/ctivit% 1* &ilding a si$)le and co$)o&nd $ac#ine'

#ocedues/

1& )et u$ two sets of inclined $lane as s!own below/

'y $us!ing t!e same load u$ bot! inclined $lane& 0!ic! is easie

0!en you double t!e lengt! of an inclined $lane, you t!emec!anical adantage&

2& Build 4 sets of $ulley wit! t!e same load attac!ed as s!own below&

0!ic! set of $ulley equies t!e least foce to lift t!e load E$lain&

&5 m1 m

block ofwood

1cm

1cm

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3& *dentify a $oblem eg !ow to $luck fuits fom a tall tee& #lan and design a modelt!at inco$oate sim$le mac!ines to oecome t!e $oblem& E$lain !ow you canim$oe you model’s mec!anical adantages and efficiency&

(astey f 6nowledge nd )kills 7uestions/ 1& t t!e end of t!ese actiities, answe t!e following questions/

8a9 0!at !ae you leant fom t!ese actiities81 maks9

8b9 0!ic! $at of t!e $imay science cuiculum teac!es t!is $aticula to$ic

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8c9 %iscuss !ow you can use t!ese actiities in you teac!ing and leaning

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8d9 0!at was t!e ole of t!e teac!e in t!ese actiities83 maks9

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Practical Investigation Involving PCK (Pedagogical Content Knoledge! o" t#ePri$ar% Sc#ool Science C&rric&l&$'

PCK * &o%anc%2 "loating and sin,ing

O-ectives* 'o inestigate conditions essential fo buoyancy, floating and sinking

.aterials/

'wo measuing cylinde, saline solution, 2 eggs, wate toug!, and 5 balls of $lasticene8eac! 5g9&

/ctivit% * Investigating #% a od% "loat or sin, in a od% o" li&id #ocedues/

1& :ill two measuing cylinde ; full, one wit! ta$ wate and t!e ot!e wit! salinesolution& #lace an egg in eac! and obsee w!at !a$$ens&

2& 'ake 3 balls of $lasticene, eac! measuing 5g& :as!ion 2 of t!e balls into t!e s!a$eof a boat, one wit! low sides and t!e ot!e wit! !ig!e sides&

3& #lace t!e 5g ball and t!e two boats into a wate toug! filled ; full wit! wate&


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Practical Investigation Involving PCK (Pedagogical Content Knoledge! o" t#ePri$ar% Sc#ool Science C&rric&l&$'

PCK 3* E&iliri&$ and t#er$o$etr%

O-ectives* 'o design and build effectie food containes to kee$ you t!ings !ot and cold&

.aterials/

:ood 8!ot c!icken and coco-cola9, $olystyene s!eet 81 m ? 1m9, ice, cadboad bo, bown$a$e, cotton wool, $lastic bags, sawdust, coconut !usk, glue, sting, and cello$!ane ta$e&

/ctivit% * &ilding "ood containers to ,ee) %o&r t#ings #ot and cold&

#ocedues/

1& :ist identify t!e mateials t!at ae good !eat insulatos&

2& %esign food containes to kee$ you food !ot and cold& %aw you $lans&

3& E$lain you $lans&

4& (ake you models&

5& 'est t!em out&

7uestions/

1& e you models effectie 0!y o w!y not

2& 0e use a efigeato to kee$ ou food cold& @ow does it $efom t!is task




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SCE3105 PHYSICS IN CONTEXT

Practical /ctivities

Tale O" Contents

Practical To)ic Page

1 (easuement in eeyday life A-

2 :oce and motion 1-12

3 (aking music 13-14

4 (icosco$es and telesco$es 15-1"

5 Electical cicuits 1.-1

" *nduction and tansmission of electic cuent 2-22

#e$aed by %& 'an (ing 'ang)cience %e$atment*nstitut #eguuan Batu +intang1 $il 2.

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Practical 1* .eas&re$ent in ever%da% li"e (4 #o&rs!'

O-ective* 'o take and com$ae measuements using diffeent ty$es of instuments&

Instr&$ents .aterials/

(ete ule, enie cali$es, micomete scew-gauge, beam balance, electonic balance, a$iece of co$$e wie, $encil, !ai and a teas$oon of sand&

/ctivit% 1* .eas&ring lengt#

#ocedues/

1& By using t!e mete ule, enie cali$es and micomete scew-gauge, measue t!ediamete of a $encil, $iece of co$$e wie, and a stand of you own !ai&

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3& 'abulate you esults&


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Practical * 6orce and $otion (4 #o&rs!'

O-ectives* 19 'o identify t!e diffeent ty$es of foce in diffeent contets&29 'o measue t!e acceleation of a feely falling ob=ect&

.aterials/

wooden block, a $ing-$ong ball, a stetc!ed wie on a wooden block, a beake and a book

/ctivit% 1* Identi"%ing di""erent t%)es o" "orce in di""erent conte7ts& #ocedues/

1& #lace a wooden block on t!e floo& Fie t!e wooden block a $us! and ecod youobseations&

2& '!ow a $ing-$ong ball u$ into t!e ai&


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/ctivit% * .eas&ring t#e acceleration o" a "reel% "alling o-ect&

.aterials/

ticke-time, ticke ta$e, clam$, $owe $ack, connecting wies, masses of 3 g, 45 g and" g and cello ta$e

#ocedues/

1& #lace a c!ai on to$ of a table& >lam$ a ticke-time onto t!e u$$e side of t!e c!ai&

2& :i a $iece of ticke ta$e t!oug! t!e ticke-time and t!en cellota$e a 3g mass tot!e ta$e&

3& )witc! on t!e ticke-time and let t!e mass fall feely downwads&

4& >ut t!e ta$e into 2 dots sti$s and aange t!em to fom a ga$!&

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8c9 %iscuss !ow you can use t!e aboe $actical in you teac!ing and leaning

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8d9 0!at was t!e ole of t!e teac!e in t!e aboe $actical83 maks9

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Practical 3* So&nd &alit% (4 #o&rs!'

O-ectives* 19 'o demonstate and e$lain !ow diffeent sound quality is $oduced&

.aterials/

3 identical glass bottles, wate, tuning fok, bowl, mete ule, and $encil&

/ctivit% * 8e$onstrating t#e )rod&ction o" di""erent so&nd &alit%' #ocedues/

1& :ill a bowl wit! wate& 'a$ a tuning fok against t!e sole of you s!oes& #lace t!e ti$of one of t!e $ongs in t!e wate& 0!at do you obsee

2& 'a$ t!e tuning fok again& #edict w!at will !a$$en w!en you !old it nea you ea&

0!at do you !ea

3& #ut wate into 3 identical glass bottles so t!at bottle is G full, bottle B is H full andbottle > is ; full&

4& (easue t!e distance fom t!e to$ of eac! bottle to t!e suface of t!e wate& '!enmeasue t!e !eig!t of t!e wate in eac! bottle&


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7uestions/

1& *n $ocedue ", w!ic! bottle $oduced t!e !ig!est $itc! 0!at caused t!e c!ange in$itc! fom bottle to bottle

2& %escibe !ow t!e sound is $oduced in $ocedue A 0!ic! bottle $oduced t!e!ig!est $itc! 0!at caused t!e c!ange in $itc! fom bottle to bottle

3& >om$ae t!e sounds you $oduce by blowing acoss t!e to$ of t!e bottles wit! t!ose$oduced by ta$$ing on t!e bottles& 0!at was t!e diffeence in $itc! fo eac! bottle&E$lain you obseations&

4& By looking at you data table, !ow does t!e lengt! of t!e column of ai affect t!e$itc! @ow does t!e !eig!t of t!e wate affect t!e $itc!

5& 0!at conclusions can you daw about t!e elations!i$ between t!e sounds $oducedand t!e medium t!oug! w!ic! t!e sound taels

"& THINK* Ciolins ae stinged instuments& :lutes and clainets ae woodwinds, andtum$ets ae bass instuments& 0!at do all t!ese musical instuments !ae incommon

(astey f 6nowledge nd )kills 7uestions/ 1& t t!e end of t!e $actical, answe t!e following questions/

8a9 0!at !ae you leant fom t!e $actical81 maks9


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Practical 4* .icrosco)es and telesco)es (4 #o&rs!'

O-ectives* 'o detemine t!e conditions essential fo inceasing t!e magnification $oweof bot! t!e astonomical telesco$e and com$ound micosco$e&

.aterials/

(ounting od, $lasticene, lens !oldes, cone lenses 8J2&5 %, J. %, J14 %, J 2 %9

/ctivit% 1* &ilding a si$)le astrono$ical telesco)e' #ocedues/

1& Kou ae gien coneging lenses of diffeent focal lengt!s& %escibe wit! t!e !el$ of adiagam !ow you set u$ a sim$le astonomical telesco$e&

2& Build you sim$le astonomical telesco$e and test it out by focusing on a distant

ob=ect& %etemine t!e magnification of you telesco$e&

3& @ow can you incease t!e magnification $owe of t!e telesco$e 'est out you idea&

/ctivit% * &ilding a co$)o&nd $icrosco)e&

#ocedues/

1& Kou ae gien coneging lenses of diffeent focal lengt!s& %escibe wit! t!e !el$ of adiagam !ow you set u$ a com$ound micosco$e&

2& Build you com$ound micosco$e and test it out by focusing on a tiny ob=ect&%etemine t!e magnification of you com$ound micosco$e&

3& @ow can you incease t!e magnification $owe of t!e com$ound micosco$e 'estout you idea&

7uestions/

1& )tate t!e functions of bot! t!e ob=ectie and eye lenses of t!e astonomicaltelesco$e&

2& @ow do you incease t!e magnification $owe of bot! t!e astonomical telesco$e&and com$ound micosco$e

3& 0!at $ecautions !ae you taken in undetaking t!e aboe $o=ects 0!y

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8d9 0!at was t!e ole of t!e teac!e in t!e aboe $actical

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Practical 5* Electrical circ&its (4 #o&rs!'

O-ective* 'o detemine t!e adantages and disadantages of seies and $aallelcicuits&

.aterials/

Battey !olde, batteies, seeal insulated wies, ammete, oltmete and lig!t bulbs

/ctivit% 1* &ilding a si$)le series and )arallel circ&its'

#ocedues/

1& >onstuct bot! t!e cicuits s!own below by using a battey !olde, a battey, seealinsulated wies and two lig!t bulbs fo eac! cicuit&

2& >onnect all wies and obsee t!e lig!t bulbs&

3& Now connect t!e ammete and oltmete in bot! t!e aboe cicuits& >onstuct asuitable table to ecod t!e eadings&

4& Now unscew one bulb in eac! cicuit& bsee t!e emaining bulbs and also ecoddown t!e eadings of bot! t!e ammete and oltmete in eac! cicuit&

5& Now connect anot!e bulb in seies to cicuit & bsee t!e emaining bulbs andalso ecod down t!e eadings of bot! t!e ammete and oltmete&

"& Now connect anot!e bulb in $aallel to cicuit B& bsee t!e emaining bulbs andalso ecod down t!e eadings of bot! t!e ammete and oltmete&

7uestions/

1& 0!at !a$$ens to t!e bulbs in a seies cicuit if one of t!e bulbs buns out E$lain&

2& 0!at !a$$ens to t!e bulbs in a $aallel cicuit if one of t!e bulbs buns out E$lain&

3& Kou ae building a sting of lig!ts using seeal bulbs& @ow is t!e big!tness of t!elig!ts elated to w!et!e you connect t!e bulbs in seies o in $aallel

4& 0!at !a$$ens to t!e bulbs in a seies cicuit if anot!e bulb is connected in seies toit E$lain

5& 0!at !a$$ens to t!e bulbs in a $aallel cicuit if anot!e bulb is connected in $aallelto it E$lain

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/ctivit% * &ilding a co$ined series and )arallel circ&it #ocedues/

1& >onstuct t!e cicuit s!own below by using a battey !olde, a battey, a switc!,seeal insulated wies and t!ee lig!t bulbs&

2& >onnect t!e switc! and obsee t!e lig!t bulbs&

3& Now connect t!e ammete and oltmete to measue t!e cuent and $otentialdiffeence t!oug! eac! bulb& >onstuct a suitable table to ecod t!e eadings&

4& Now emoe bulb 1& bsee t!e emaining bulbs and also ecod down t!e eadingsof bot! t!e ammete and oltmete&

5& Now emoe bulb 2& bsee t!e emaining bulbs and also ecod down t!e eadingsof bot! t!e ammete and oltmete&

7uestions/

1& 0!at !a$$ens to t!e ot!e bulbs in t!e cicuit w!en bulb 1 is emoed E$lain&

2& 0!at !a$$ens to t!e ot!e bulbs in t!e cicuit w!en bulb 2 is emoed E$lain&

3& 0ould you want t!e cicuits in you !ome to be seies o $aallel cicuits o acombination of bot! E$lain you easoning&

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Practical 9* Ind&ction and trans$ission o" electric c&rrent (4 #o&rs!'

O-ective* 'o inestigate t!e factos w!ic! affect t!e magnitude of t!e cuent induced&

.aterials/

>o$$e coil, galanomete, and magnets,

/ctivit% 1* Investigating ind&ced c&rrents'

#ocedues/

1& 0ind a co$$e coil of 1-2 tuns aound two finges& >onnect t!ei fee ends to asensitie galanomete&

2& *nestigate w!at !a$$ens w!en t!e/

8a9 Not! $ole of magnet is moed into t!e coil8b9 Not! $ole of magnet is moed out of t!e coil8c9 Not! $ole of magnet is moed ey quickly into t!e coil8d9 coil is moed oe t!e magnet8e9 magnet is ke$t stationay in t!e middle of t!e coil

3& onnect t!ei fee ends to asensitie galanomete&


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4& *n t!e aboe tansfome, t!e numbe of tuns in t!e seconday is lage t!an t!e$imay& 0!at is t!e name of t!is tansfome 'un on t!e switc! and ecod youmeasuements&

5& Now eese t!e connections of bot! t!e $imay and seconday coils& '!e numbe of tuns in t!e seconday is now smalle t!an t!e $imay& 0!at is t!e name of t!istansfome 'un on t!e switc! and ecod you measuements&

7uestions/

1& :o a ste$-u$ tansfome, w!ic! cuent do you e$ect to be t!e lage I $imaycuent o seconday cuent

2& @ow do you measue t!e $owe in$ut and $owe out$ut fo t!e ste$-u$ tansfomeand w!at ae t!ei alues

3& >alculate t!e atio of t!e $owe out$ut to $owe in$ut& 0!at is t!is atio called

4& *n t!e tansmission of electicity, t!e $owe loss in eac! electic cable is calculated byusing t!e fomula,

#owe loss in eac! cable *2 < w!ee * is t!e cuent and< is t!e esistance of a cable

@ow can t!is $owe loss be educed

5& E$lain t!e ole of t!e ste$-u$ tansfome in !el$ing to educe $owe loss duing t!etansmission of electicity&

"& :o a ste$-down tansfome, w!ic! cuent do you e$ect to be t!e lage I $imaycuent o seconday cuent

.& 0!at ae t!e alues of t!e $owe in$ut and $owe out$ut fo t!e ste$-downtansfome

A& E$lain t!e ole of t!e ste$-down tansfome in t!e tansmission of electicity&




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prac 1-9physics in context

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