1-5 Measurement

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1-5 Measurement

  1. 1. 1-5 Measurements <ul><li>Compare and contrast accuracy and precision. </li></ul>
  2. 2. Accuracy & Precision <ul><li>Accuracy is how close to the accepted value. </li></ul><ul><li>Precision is how close a series of measurements are to each other. </li></ul>
  3. 3. Accuracy & Precision (cont.)
  4. 4. Accuracy & Precision (cont.) <ul><li>Students collected density data for powered sucrose. </li></ul><ul><li>The accepted density is 1.59 g/cm 3 . </li></ul>Density Data Collected by Three different Students Student A Student B Student C Trial 1 1.54 g/cm 3 1.40 g/cm 3 1.70 g/cm 3 Trial 2 1.60 g/cm 3 1.68 g/cm 3 1.69 g/cm 3 Trial 3 1.57 g/cm 3 1.45 g/cm 3 1.71 g/cm 3 Average 1.57 g/cm 3 1.51 g/cm 3 1.70 g/cm 3
  5. 5. 1-5 Summary <ul><li>What is the difference between accuracy and precision? </li></ul><ul><li>Which temperature units are used in science? </li></ul>

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