# They make the measurement more accurate and make it

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correct number of significant digits in a measurement? They make the measurement more accurate and make it so the margin of error is less Open Ended Question Notes: more precision needed means more work it will take.

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Slide 8 of 19 Quiz Let's find out what you already know! 1. If you are measuring 25 mL of liquid in a beaker that is graduated every 1 mL, the measured volume would be 25 mL 25.0 mL 25.00 mL 2. Which measurement is the most precise measure of the density of platinum? 21 g/mL 21.5 g/mL 21.45 g/mL 3. How many significant figures are in 0.00970 g? 6 5 3 4. According to the rules of significant figures, what is the correct answer

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to 3.41 + 5? 8.41 8.4 8 5. According to the rules of significant figures, what is the correct answer to 3.4 x 5? 20 17 10 6. Which group of measurements (all in Celcius) are the most accurate if the boiling point of water is 100.0 degrees C? 99.0, 97.9, 98.5 100.1, 99.8, 100.2
Slide 9 of 19 Draw It Circle the piece of glassware that gives the MORE precise measurement.

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Slide 11 of 19 Web Content Significant Figures Open the Original
• Fall '19
• Accuracy and precision, Lorraine Seawright

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