Name  ________________________ Date ________ Section # ________ http://www.stmary.ws/highschool/physics/home/
Plotting/Precision Pre-Lab Activity
1.
 d (cm) t (secs) 0 0 5 2 9 3 15 4 20 5 22 6 23 7 24 8
2.
 d (cm) t (secs) 0 0 2 5 6 10 10 20 18 25 22 30 26 35 30 40
3.
 d (cm) t (secs) 0 0 1 .4 9 .8 12 1.2 18 1.6 19 2.0 20 2.4 50 2.8
4.
 d (cm) t  (secs) 0 0 1 2 2 4 3 6 3 8 5 10 4 12 3 14
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Taking and Reporting Precise Measurements

1.  Use your ruler to measure the length of this line  __________   (8 points)

2.    All measurements are approximations.  The way you report a measurement describes the precision of your measuring device.

Do all these measurements mean the same thing?  (10 points)

1.0      1.00     1.000

Yes or No?  Why?
When you report a number your last digit is looked on as an ________________.

Circle the number below that matches the measurement below

7.21 cm     Precise to a tenth of a cm                                  (10 points)

7.211 cm    Precise to a  _______________  of a cm              (10 points)

7.2 cm        Precise to a ________________ of a  cm             (10 points)

How would you report this measurement? ________________          (5 points)

 How would you report this measurement? ________________           (5 points)   How would you report this measurement? ________________           (5 points)    Lab Activity   1. Name one object in our classroom that has a length or width that is very close to 1 meter long  _______________ (3 points)           a) Exactly what is this measurement?  __________ m (2 points) 2.  Estimate the height of Marist in meters _________________ m (3 points) (Hand in on a separate piece of loose-leaf) 3.  Find something in your book bag that has a length or width that is very close to 1 cm long _______________ (3 points)           a) Exactly what is this measurement?  __________ cm (3 points) 4. Use your meter stick and stop watch to find out the approximate walking speed of one of your lab partners.     Speed = distance/time   _____________  =  ____________ (3 points) © Tony Mangiacapre., St. Mary's HS, Manhasset, NY-All Rights Reserved [Home] Established 1995