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Measurement

Measurement. Scientific Measurment. Scientists use a common system of units called the International System of Units. This can be abreviated “SI Units” This allows scientists to share information more easily. Length. SI Unit – meters Abbreviation – m Tool used to measure – meter stick.

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Measurement

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  1. Measurement

  2. Scientific Measurment • Scientists use a common system of units called the International System of Units. • This can be abreviated “SI Units” • This allows scientists to share information more easily.

  3. Length • SI Unit – meters • Abbreviation – m • Tool used to measure – meter stick

  4. Mass • SI Unit – kilogram • Abbreviation - kg • Tool used to measure - balance

  5. time • SI Unit – seconds • Abbreviation - s • Tool used to measure - stopwatch

  6. Volume • FOR LIQUIDS • SI Unit – liters • Abbreviation - L • Tool used to measure – graduated cylinder • FOR SOLIDS • SI Unit – cubic centimeters • Abbreviation – cm3 • Tool used to measure – meter stick • Length x width x height • 1 cm3 = 1 mL

  7. Temperature • SI Unit – kelvin or celcius • Abbreviation – K of C • Tool used to measure – thermometer • °C + 273 = K • Boiling Point of Water • 212°F=100°C=373 K • Freezing Point of Water • 32°F=0°C=273 K

  8. Volume • To find the volume of an iregular solid use the displacement method. • First measure the volume of liquid in a beaker. • Place the irregular object into the liquid. • Measure the new volume of the liquid. • Subtract the first volume from the second. • The difference between the two is the volume of the irregular solid.

  9. Conversions King Henry Drank Dark Chocolate Milk Decimal Moves

  10. Example • 1 m = .1 dkm = .01 hm = .001 km • 1m = 10 dm = 100 cm = 1000mm

  11. Graphs

  12. Significant Figures • The significant figures of a measure show the precision that you know for sure • When working a problem, you can only have as many significant figures as your lowest significant figure in the answer. • All non-zero numbers are considered to be significant. • Zeros between two significant numbers are considered to be significant • Zeros to the right of a significant figure on the right of a decimal are considered significant • Zeros to the right of a significant number with no decimal are not significant

  13. Significant Figure Examples • .000234 • 1.0027 • 5600 • 5.3200 • 7.990099 • 3 • 5 • 2 • 5 • 7

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