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Volume – amount of space occupied by an object Length – distance between two points

Measuring Basics. Volume – amount of space occupied by an object Length – distance between two points Mass – amount of matter in an object Time – period between two events Temperature – measure of the energy particles have. Measuring … … using Significant Figures!!.

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Volume – amount of space occupied by an object Length – distance between two points

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  1. Measuring Basics • Volume – amount of space occupied by an object • Length – distance between two points • Mass – amount of matter in an object • Time – period between two events • Temperature – measure of the energy particles have

  2. Measuring … … using Significant Figures!! • Significant figures is used to show the accuracy in a measurement: • Accuracy depends on the smallest increment shown on measuring tool (meter stick, balance, etc.) • The last decimal place (digit) is an estimate • The more decimals places (digits), the more accurate that measurement is

  3. Measuring • 4 sided meter stick example

  4. The 3 steps to measuring with significant figures Think about a number 642.351 Hundreds, Tens, Ones, Tenths, Hundredths, Thousandths

  5. 1. Determine the smallest increment on the measuring tool • Hundreds • Tens • Ones • Tenths • Hundredths • thousands What decimal place does each small line represent?

  6. 2. Determine the next decimal place beyond that smallest increment(Your measurement will be recorded to this decimal place) • Hundreds • Tens • Ones • Tenths • Hundredths • thousands What is the next decimal place?

  7. 3. Record the measurement, estimating one decimal place past the smallest increment shown • 824 cm • 82.4 cm • 8.24 cm • 8.240 cm • 82 cm • 8.2 cm What is the proper measurement?

  8. The proper measurement: The Pencil is more than 8.2 cm long … … But less than 8.3 cm long … so we estimate to the next decimal place. 8.24cm The decimal places recorded shows accuracy of the measurement tool The measurement recorded is to the hundredths place, so we know the smallest increment was to the tenths

  9. Volume Graduated Cylinder

  10. You always estimate one decimal place PAST the smallest increment shown Measuring Volume ? 7 Meniscus – read measurements at bottom of meniscus

  11. Volume? • 50.2 mL • 50.28 mL • 52.8 mL • 52.80 mL • I have no idea

  12. Length Meter stick or Ruler

  13. Length? • 8 mm • 8.0 mm • 8.00 mm • 80 mm

  14. Now for the balance!!!

  15. Mass? • 602005.72 • 200605.72 • 260.572 • 265.72 • 265.720 • 265.7

  16. Temperature Fahrenheit (º F ), Celsius (º C ), Kelvin (K) º C = (º F - 32.0 º) 5 9 º F = (º C) + 32.0 º 9 5 K = º C + 273

  17. If you need extra help! Basic measuring practice

  18. Images Cited • www2.oregonscientific.com • http://www.labrecyclers.com/pics/ohaus_trip.jpg • http://www.bourne.k12.ma.us/Class%20Links/Smith/Smith/images/tripple%20beam%20balance.jpg • http://www.northernbrewer.com/pics/fullsize/lab-thermometer.jpg

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