> OQNq` bjbjqPqP .(::222F,F;777;;;;;;;$I=h?T*;27_.( 777*;q?;?8?8?8782;?87;?8?8:2:7d:;U;0;:@8@:@2: 77?877777*;*;#8777;7777FFFdFFFFFF Name: ____________________________
Group #: ______
Measurement Lab
Purpose:
To learn how to use different measuring tools properly and accurately.
PreLab Questions
1) Why is measurement so important to science? How does this relate to the scientific method?
2) Name 2 reallife situations in which you measure things. What level of accuracy does each task require?
3) Name 2 occupations that require measurement. BRIEFLY explain why. What level of accuracy is required?
4) What is the difference between the quantity being measured and the unit used to measure it? Answer by giving two examples of each, labeling which is a quantity and which is a unit.
5) Someone measures a penny with a regular metric ruler and says that it is 2.5400133 centimeters wide. What is wrong with that? Explain your answer.
Questions: (Follow the lab procedure found on the other pages. Put your answers here.)
1) Explain the rule about estimating digits in measurements.
2) In Example 1, explain why 2.13 is incorrect.
3) Which digit (3, 7, or 6) in the answer to Example 2 is the estimated digit? ____________
4) If someone said the answer was 3.8 for Example 2, what did they fail to do?
5) Because the estimated digit is well, estimated it doesnt have to agree perfectly with another persons estimation. It should be +/ 1. Based on this, what are two other possible answers someone could have given that would still be correct, instead of 3.76?
6) How would the ruler have to be different to get 3.762 as your answer?
7) Look at the smallest markings on a metric ruler and a Shultz ruler; remember that you must estimate 1 digit between the smallest marks. What decimal place should you estimate to with each measuring device? (Tenths, hundredths, or thousandths?)
regular ruler (metric side): ______________ Shultz ruler: ____________
8) a) Measure Line 1 (see other page) using a regular ruler. Answer: _________________
b) Measure Line 1 using the Shultz ruler. Answer: _________________
9) a) Measure Line 2 using a regular ruler. Answer: _________________
b) Measure Line 2 using the Shultz ruler. Answer: _________________
10) Just as a random question, what does graduated mean, in the term graduated cylinder? Look up graduated in a dictionary if you dont know. Figure out which definition applies and put it here in your own words.
PART ONE: The Estimated Digit.
When you use a measuring device, you should always estimate one digit in between the smallest marks on the device. For example, say a centimeter ruler is marked like this. The thick black line is the object being measured.
Example 1:
1 2 3 4 5
The dark line goes a little past the 2, so the answer is 2.1. The 1 is the estimated digit: you ESTIMATED that the dark line is about 1/10 of the way between the 2 and the 3.
It is also wrong to estimate too much, such as saying 2.13. That is wrong because you are estimating TWO digits, and claiming that the dark line is 13/100 of the way between the 2 and the 3. The human eye is simply not good enough to picture 100 markings between the 2 and the 3, and say its at the 13th mark! You should (and must) estimate only one digit.
Example 2:
1 2 3 4 5
With this ruler, the best answer for the length of the above line is 3.76.
( DO QUESTIONS 17 ON THE QUESTIONS PAGE.
Part 2: Measuring with Rulers
Apply what you just learned to measuring the lines below. Include UNITS in your answer and include an ESTIMATED digit.
Line 1: Line 2:
( DO QUESTIONS 810 ON THE QUESTIONS PAGE.
 cut here 
0 1 2 3 4 5 6 7 8 9 10 11 12 13
The Shultz Ruler
R[_IOPQST?AyIJKMNObd{ ha hd+*; jhd+* hd+*H*jhd+*UmHnHu hd+*6 hd+*5hd+*.*ABRST^_ &$$d%d&d'dNOPQa$#$d%d&d'dNOPQ$a$ !
Z[\]^_`a#$d%d&d'dNOPQ,./
9:;<56/`dh/0yzIPRSUV
xyh^h`JLMObz{ ]h^h,/ =!"#$F%H@HNormal CJOJPJQJ_HmH sH tH >@> Heading 1$$@&a$5@ Heading 2R$$$d%d&d'd@&NOPQa$58@8 Heading 3$@&5DADDefault Paragraph FontVi@VTable Normal :V44
la(k@(No List8>@8Title$a$CJ$OJQJ (*ABRST^_ !Z[\]^_`a,./9:;<56/0yz
IPRSUV
x
y
JLMObz{!I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I0I00000000000000000000000000000000000000000000000000000000000000000000000000000000000(0000000000000I0I0
/ 8@(O(
HB
CDHB
CDHB
CDHB
CDHB
CDHB
CDHB
CDNB
SDԔNB
SDԔ<HB
CD;HB
CD:HB
CD9HB
CD8HB
CD7HB
CD6HB
!
CD5HB
"
CD4HB
#
CD3HB
$
CD2HB
%
CD1NB
&
SD1,HB
'
CD0HB
(
CD/HB
)
CD.HB
*
CDHB
+
CD+HB
,
CD*HB

CD)HB
.
CD(NB
/
SD1'HB
0
CD&HB
1
CD%HB
2
CD$HB
3
CD#HB
4
CD"HB
5
CD!HB
6
CD HB
7
CDNB
8
SD1HB
9
CDHB
:
CDHB
;
CDHB
<
CDHB
=
CDHB
>
CDHB
?
CDHB
@
CDNB
A
SD1HB
B
CDHB
C
CDHB
D
CDHB
E
CDHB
F
CDHB
G
CDHB
H
CDHB
I
CD
NB
J
SD1HB
K
CDHB
L
CD
HB
M
CD HB
N
CDNB
Z
SDԔ>NB
[
SDԔ=HB
CDMHB
CDDHB
CDLHB
CDKHB
CDJHB
CDIHB
CDHHB
CDGHB
CDFHB
CDEHB
CDCHB
CDBHB
CDAHB
CD@HB
CD?B
S ?IJKLMNPS !"#$%&'()*+,./0123456789:;<=>?@ABCDEFGHJMbc ""ttt
tttN"t atN""(tM]!]!(tL (tK(tJAAtI(tH(tG%%(tFqq(tE (tDUU(tC(tB(tA99t@(t?(t>(t=ii(t<(t;MM(t:(t9(t811t7}}(t6(t5(t4aa(t3(t2EE(t1(t0
(t/)
)
t.u u (t(t,
(t+YY(t&!!t*(t)==(t((t'(t%mm(t$(t#(t"QQ(t!""t tt
tttN"t#t[tZt$ $t" "tA Atq qt tQ Qt t t1 1ta at t t t! !tQ9$9t!47>45!333333!!L. ^`OJPJQJo(^`OJQJo(opp^p`OJQJo(@@^@`OJQJo(^`OJQJo(o^`OJQJo(^`OJQJo(^`OJQJo(oPP^P`OJQJo(Ld+*a@wn P@UnknownGz Times New Roman5Symbol3&z Arial;Wingdings3z Times]Apple ChanceryCourier New?5 : Courier New 1hffg
g
!42qHX?a2Michael ShultzMshultzOh+'0\
$
0<DLTMichael ShultzNormalMshultz2Microsoft Office Word@G@6 @6 g
՜.+,0hp
Wissahickon School DistrictTitle
!"#$%&'()*+,./0123456789:;<=?@ABCDEGHIJKLMPRoot Entry FRData
1Table@WordDocument.(SummaryInformation(>DocumentSummaryInformation8FCompObjq
FMicrosoft Office Word Document
MSWordDocWord.Document.89q