1.   Identify the precision unit of the ruler below.
   
    A. in. B. in.
    C. 4 in. D. in.
    Hint

  2.   Identify the precision unit of the graduated cylinder below.
   
    A. 1 mL B. 0.5 mL
    C. 5 mL D. 2 mL
    Hint

  3.   Identify the precision unit of the scale below.
   
    A. 1 oz B. 0.5 oz
    C. 0.3 oz D. 0.25 oz
    Hint

  4.   Identify the length of the pencil using significant digits.
   
    A. 18.05 cm B. 18.2 cm
    C. 18 cm D. 18.15 cm
    Hint

  5.   Maurice Greene of the United States won the 100-meter run in the 2000 Olympics with a time of 9.87 seconds. How many significant digits are in this measurement?
    A. 3 B. 9
    C. 7 D. 8
    Hint



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