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

  2.   Identify the precision unit of the clock below.
    A. 1 h B. 30 min
    C. 3 h D. 1 min

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

  4.   Identify the weight shown on the scale using significant digits.
    A. 8.7 kg B. 8.65 kg
    C. 8.6 kg D. 8 kg

  5.   The temperature at the core of the sun is estimated to be over 15,000,000 degrees Celsius. How many significant digits are in this measurement?
    A. 2 B. 15
    C. 8 D. 6

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