qulry TIte Metric $ystem The rnetic system is a decir:ral system (based cn Irac- tions or niultiples of 10) tliat uses ordY one basic unit for each type of measurement: the meter {m) as the unit of length (Figure 23.1’s, the liter (1) as the up..it of volume (1 liter is equal to the volume of 1 kilogram of pure rvater at 4’C [39.2’F], about 1.06 quarts.), and the gram (g) as the unit of mass (Figure 23.2)’ In the Enqlish slzstem, the units use,l to express the sanr.e relations are feet, q’.rarts, and ounces.

Warking with the Metrlc System In tire metric svstem, the basic rurits of rveights a:rd n-ie,rs- Lres are relateci by mu.ltiples ol ten. It is similar to the U.S. monetary svstem, tthere 10 pennies = 1 dime anr.-l

Table 23″1 Base Units of the Sl1

Norlh Fole

Figu re 23.1 The Si unit of length is the metei (m), rvhicn is si:ghtJy longer than a yard. Origirai ly descr-ibed as cne ter-miiircnth af tre Cisiance frcnr the equatcr to the ijar-lh Pcle. it js curren|,; d+lrn96 25 t:? i,3:-ltce tr3ve:?C l; C.0C0CCOCC33 seicnC.

light i- a vaiiir..:n: r;-r

lvletcr KiLograii’r

Sect–,r-rd

Kel.,’in Arnpeie [1o]c Candela

Length Niass

Timt: flermodvn arrtic teniperafu re Elech’ic culrent Quantit,v- of a substance I.uininous fu’rteruitv

11-i

t– KF,

S

K

rnol cd

1C ciimes = I doljar. In ihe EngJisl-r s,i:siem rf r,veights .:.rr.d fileasu-res, no such reg,-:1aiitr,’exists; for exarr,ple,”t? inch- cs = 1 ioot and 52Sii i’eet = 1 stalute tr-rile.

.llrus. the aclr.an_

i.:ge of Li^,e tr:e*lic s,lster,r is 1,,;i.i.ssfeirrcl. lable 23.2 1i=ts the p_rei-ires th;t ire L1sr.d in ihe rrrei_

ric svstr.m to ir,dicate horv mariv tjmes more (jn ii_,Lriti_ ples of 10) or r,l-iat fraction (in rrar-tions of 10) of thr-: basic r-mit is present. Therefore, from the injormatrr:n in the tabie, riorl see that 1 kilcgram (kgi = it00 srarr,,-q. rshiie 1 mi!!igram (mg) = 1i 1040 g.u*i

To fami.liarize lrourseii ryitlirnelric urits, clrter_:line the fcilouring rieosui€rrr€l-tts. using the eqr_lip_ men t p r1-ii.’ i 1i e cl ii-r t]:e la b t_.,r tt f u r,.

GRAM (gi

MIIEH (m)

hjicKel i5c;

2m

t,̂g

Leiron

I

il r r r’;: h. ,.-5ul iitt-ii’!!t

‘ilr.t r -i-, -, | –

Liter oi ,r,,aier 10C0 g

I

I {*

-l1ll

:

c

100 rrr *.-/

r

a ,t

l

Tie ba:ia i.jrlit oi i’I’3ss in tne n]3tric s:rsiet rs:n: grail igi, apprcxri:a’,e1y ec,-ral io the .Iia5: of 1 culic ceniln:eter’:i puie !vat.r:t 4’C (39.2’Fj. A grarrr is about the weight oi 2 paper’ cjjps, ard ar 0urce is abDiti the weig,ri oi,1C paper clips.

,’ Icrr,s rr rl irg i i’rr{ t/l;

1. Use a metdc measuring tape (or meterstick) to measllre y’cur hc.ig1-rt as accuj’atelY as po-ssibit’to the

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