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WS 2-4

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  • pg 1
									Name                                                 Date                                    Class

             THE INTERNATIONAL SYSTEM OF UNITS

   Objectives
    List SI units of measurement and common SI prefixes
    Distinguish between the mass and weight of an object
    Convert between Celsius and Kelvin temperature scales

   Vocabulary
    International System of          kilogram (kg)                            absolute zero
       Units (SI)                     gram (g)                                 energy
    meter (m)                        temperature                              joule (J)
    liter (L)                        Celsius scale                            calorie (cal)
    weight                           Kelvin scale


Part A: True-False
Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT.

            11. The SI base unit of mass is the milliliter.

            12. A decigram is 100 times smaller than a gram.

            13. The SI unit of volume is derived from the unit of length.

            14. There are six basic SI units of measurement.

Part B: Matching
Match each description in Column B to the correct term in Column A.

                 Column A                                       Column B
            15. Kelvin scale                                  a. the capacity to do work or to produce heat

            16. International System of Units (SI)            b. the SI unit of energy

            17. meter                                         c. non-SI unit of volume

            18. Celsius scale                                 d. standardized system of measurement based on the metric system

            19. liter                                         e. mass unit commonly used in chemistry

            20. joule                                         f. the SI unit of length

            21. weight                                        g. force that measures the pull of gravity on a given mass

            22. absolute zero                                 h. zero point on the Kelvin scale equal to 273.15C

            23. kilogram                                      i. SI base unit of mass

            24. gram                                          j. temperature scale on which the freezing point of water is 273.15and its
                                                                  boiling point is 373.15
            25. energy
                                                              k. temperature scale that sets the freezing point of water at 0and its boiling
                                                                 point at 100
Part C: Temperature Conversions
Answer the following questions by showing ALL work.

26. Hydrogen boils at 20K. What is the boiling point of hydrogen on the Celsius scale?




27. Mercury melts at -39 oC. What temperature is that in Kelvin (K)?




28. Liquid nitrogen boils at 77.2 K. What is this temperature in degrees Celsius?




29. What is the symbol and meaning of each prefix?

    a. milli-                                                   a.

    b. kilo-                                                    b.

    c. micro-                                                   c.

    d. centi-                                                   d.




PART D: Quick Refresh
Solve the following problems and write your answers on the blanks.


30. Write 0.0000987 in scientific notation. ____________________________

31. How many significant figures are in 10098.1 cm? _____________________

32. Round 0.02345 L to three significant figures. _____________________

33. What is the density of chlorine gas if 2.345g occupies a volume of 250mL? __________________




                                                      Edited from Pearson Chapter 3 Scientific Measurement

								
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