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Paper Towel Lab
1.
2.
3.
• TToo pprraaccttiiccee
tthhee sskkiillllss uusseedd iinn sscciieennttiiffiicc iinnvveessttiiggaattiioonnss • TToo tthhiinnkk lliikkee aa sscciieennttiisstt
4.
• MMaannyy bbrraannddss
ooff ppaappeerr ttoowweellss ccllaaiimm ttoo bbee tthhee bbeesstt.. • WWhhiicchh bbrraanndd ooff ppaappeerr ttoowweell iiss tthhee bbeesstt??
5.
• IInn rreesseeaarrcchh
llaabboorraattoorriieess,, ppaappeerrmmaakkeerrss tteesstt tthhee ppaappeerr tthheeyy mmaakkee ffoorr pphhyyssiiccaall pprrooppeerrttiieess ssuucchh aass ssttrreennggtthh,, aabbssoorrbbeennccyy,, ssttrreettcchh,, tteeaarr rreessiissttaannccee,, ffoollddiinngg eenndduurraannccee,, aanndd ssttiiffffnneessss.. TThheeyy aallssoo tteesstt ffoorr ooppttiiccaall pprrooppeerrttiieess lliikkee ttrraannssppaarreennccyy,, ooppaacciittyy,, bbrriigghhttnneessss,, ccoolloorr,, aanndd gglloossss..
6.
• SSiinnccee ppaappeerr
ttoowweellss aarree uussuuaallllyy wweett wwhheenn tthheeyy aarree bbeeiinngg uusseedd,, tthhee ““aabbssoorrbbeennccyy”” aanndd ““wweett ssttrreennggtthh”” ooff tthhee ttoowweell iiss iimmppoorrttaanntt..
7.
• AAbbssoorrbbaannccyy iiss
tthhee ttoowweellss aabbiilliittyy ttoo hhoolldd wwaatteerr.. TThhiiss ccaann bbee mmeeaassuurreedd bbyy hhooww mmuucchh wwaatteerr tthhee ttoowweell ccaann hhoolldd.. • WWeett ssttrreennggtthh iiss tthhee ssttrreennggtthh ooff ppaappeerr wwhheenn wweett.. TThhiiss ccaann bbee mmeeaassuurreedd bbyy tthhee aammoouunntt ooff mmaassss tthhaatt aa wweett ppaappeerr ttoowweell ccaann hhoolldd..
8.
• IIff__________ iiss
tthhee ssttrroonnggeesstt ppaappeerr ttoowweell,, tthheenn iitt wwiillll hhoolldd tthhee mmoosstt wweeiigghhtt.. • IIff__________ iiss tthhee mmoosstt aabbssoorrbbaanntt ppaappeerr ttoowweell,, tthheenn iitt wwiillll hhoolldd tthhee mmoosstt wwaatteerr.. ((BBoouunnttyy,, SSccootttt,, GGeenneerriicc,, TTooppss))
9.
GGaatthheerr mmaatteerriiaallss:: •
44 bbrraannddss ooff ppaappeerr ttoowweellss • GGrraadduuaatteedd ccyylliinnddeerr • 22 jjaarrss wwiitthh rriinngg lliidd • PPeennnniieess oorr wweeiigghhttss • WWaatteerr • TTrriippllee bbeeaamm bbaallaannccee
10.
VVaarriiaabbllee GGrriidd •
IInnddeeppeennddeenntt VVaarriiaabbllee:: • DDeeppeennddeenntt VVaarriiaabbllee:: • CCoonnttrroolllleedd VVaarriiaabblleess::
11.
• Step bbyy
sstteepp pprroocceessss ttoo ffoollllooww • NNuummbbeerr tthhee sstteeppss • UUssee ccoommpplleettee sseenntteenncceess.. • BBee ssppeecciiffiicc!!
12.
11.. 22.. 33..
44.. 55.. 66..
13.
11.. 22.. 33..
44.. 55.. 66..
14.
• CChhaarrtt iinncclluuddiinngg
ttrriiaallss aanndd rreedduucceedd ddaattaa ((aavveerraaggeess)) • GGrraapphh ooff rreedduucceedd ddaattaa • RReemmeemmbbeerr ttoo llaabbeell XX aanndd YY aaxxiiss aanndd ggiivvee aa ssppeecciiffiicc ttiittllee tthhaatt rreellaatteess ttoo tthhee ppuurrppoossee ooff tthhee llaabb
15.
TToowweell ##ppeennnniieess MMaassss
((gg)) ##ppeennnniieess MMaassss ((gg)) ##ppeennnniieess MMaassss ((gg)) ##ppeennnniieess MMaassss ((gg)) TTrriiaall 11 TTrriiaall 22 TTrriiaall 33 TToottaall AAvveerraaggee BBrraawwnnyy ## ## ## ## ## gg gg gg gg SSccootttt ## ## ## ## gg gg gg gg GGeenneerriicc ## ## ## ## gg gg gg gg gg
16.
TToowweell VVoolluummee ((mmll))
VVoolluummee ((mmll)) VVoolluummee ((mmll)) VVoolluummee ((mmll)) TTrriiaall 11 TTrriiaall 22 TTrriiaall 33 TToottaall AAvveerraaggee BBrraawwnnyy ## ## ## ## ## gg gg gg gg SSccootttt ## ## ## ## gg gg gg gg GGeenneerriicc ## ## ## ## gg gg gg gg gg
17.
1 0.9 0.8
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 label Title Bounty Brawny Generic label
18.
FFiirrsstt ppaarraaggrraapphh ((55
sseenntteenncceess)) • RReessttaattee tthhee hhyyppootthheessiiss.. • DDoo yyoouu aacccceepptt oorr rreejjeecctt yyoouurr hhyyppootthheessiiss?? • GGiivvee 33 ffaaccttss ffrroomm yyoouurr ddaattaa tthhaatt ssuuppppoorrtt tthhee hhyyppootthheessiiss.. LLooookk aatt yyoouurr cchhaarrtt//ggrraapphh.. • IInn ccoonncclluussiioonn,, ______..
19.
SSeeccoonndd ppaarraaggrraapphh ((55
sseenntteenncceess)) • HHooww wwoouulldd yyoouu cchhaannggee tthhiiss eexxppeerriimmeenntt iiff yyoouu rreeppeeaatteedd iitt?? • HHooww ccaann tthhiiss iinnffoorrmmaattiioonn bbee uusseedd?? • IIss iitt hheellppffuull iinnffoorrmmaattiioonn ffoorr iinnddiivviidduuaallss oorr ssoocciieettyy?? • WWhhoo ccaarreess aabboouutt tthhee rreessuullttss??
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