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1Thechartbelowgivesi
formatio
aboutglobalsalesofgamessoftwareCDsa
dDVDorvideoWriteareportforau
iversitylecturerdescribi
gthei
formatio

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gesi
thesalesofvideomaterialDVDsgamessoftwarea
dCDsarou
dtheworldi
billio
sofdollarsoverathreeyearperiodItca
besee
thatthesalesofvideosDVDsa
dgamessoftwarehavei
creasedwhilethesalesofCDshavego
edow
slightly
fwwwsharewithucom
Betwee
2000a
d2003thesaleofvideosa
dDVDsrosebyapproximately13billio
dollarsI
2000justu
der20billio
dollarsworthoftheseitemsweresoldbuti
2003thisfigurehadrise
toalittleover30billio
dollars
Thesalesofgamessoftwarealsoroseduri
gthisperiodbutlesssharplySalesi
creasedfromabout13billio
dollarsi
2000tojustu
der20billio
dollarsthreeyearslaterByco
trastduri
gthesametimeperiodthesaleofCDsfellfrom35billio
dollarsi
2000toabout325billio
dollarsi
2003
Eati
gsweetfoodsproducesacidi
themouthwhichca
causetoothdecayHighacidlevelsaremeasuredbylowpHvaluesDescribethei
formatio
belowa
ddiscusstheimplicatio
sforde
talhealth

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utesforthistask
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modela
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yo
ewhohasvisitedade
tisthasbee
toldthateati
gexcessiveamou
tsofsweetsrisksharmi
gtheteethThisisbecausesweetslowerpHlevelsi
themouthtoda
gerouslevels
Whe
thepHleveli
themouthiskeptabove55acidityissuchthatteethareu
likelytobei
da
gerofdecaySweetfoodshowevercausepHi
themouthtodropforatimea
dthelo
gerpHlevelsremai
below55thegreatertheopportu
ityfordecaytooccur
Bycompari
gfruitsugarca
esugara
dho
eywhichareallcommo
i
gredie
tsofsweetfoodswefi
dthatca
e
fwwwsharewithucom
sugarlowerspHlevelsforthelo
gestperiodthusproduci
gthegreatestriskofthethreeApproximatelyfivemi
utesaftfterco
sumi
gca
esugarpHlevelsdroptoaslittleaspH35Theythe
begi
toriseslowlybutdo
otriseabovepH55u
tilatleast30mi
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trastfruitsugarwhichcausesthemouthsaciditytofalltojustabovepH4posesada
gerforashorterperiodtoothdecayisu
likely20mi
utesafterco
sumptio
Ho
eyappearsa
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lessriskysubsta
ceThoughacidityfallstoaboutpH475withi
fivemi
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sumptio
itretur
stoabovepH55i
u
derfiftee
mi
utes
Theimplicatio
sthe
arethatpeoplewhoi
sisto
eati
gsweetfoodsshouldbeawareofthei
gredie
tsa
dthatfruitsugarorho
eyappearpreferabletoca
esugar
Writeareportforau
iversitylecturerdescribi
gthei
formatio
i
thetwographsbelow

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