1. Units Of Measurement

2. I.Units of Measurement A.What measurement system is used in all disciplines of science? 1.WHY? B.Base Units QuantityUnitAbbreviation LengthMeterm MassKilogramkg TimeSeconds TemperatureKelvinK Electric CurrentAmpereA Amount of SubstanceMolemol Luminous IntensityCandelacd

3. C.Metric System prefixes: PrefixSymbolMeaningMultiple kilokthousand1000 hectohhundred100 dekadaten10 PrefixSymbolMeaningMultiple decidtenth0.1 centichundredth0.01 millimthousandth0.001 Greater Than One Smaller Than One In between:meter - length gram - mass liter - volume

4. Use the following for metric conversions: In between:meter - length gram - mass liter - volume 1 giga = 1,000,000,000 1 mega= 1,000,000 1 kilo = 1000 1 hecto = 100 1 deca = 10 10 deci = 1 100 centi = 1 1000 milli = 1 1,000,000 micro (µ) = 1 1,000,000,000 nano (n) = 1

5. D.Accuracy and Precision 2.Precision – How accurately something is measured. 1.Accuracy – How close a measurement is to the actual value. Accuracy And Precision Good Accuracy Good Precision Poor Accuracy Poor Precision Poor Accuracy Good Precision Good Accuracy Poor Precision

6. E.Scientific Notation 1.A way to express very large or very small numbers 265,000 2.65 x 10 5 2.HOW a.1. Find the decimal b.Count Positive (Number is greater than one.) Negative (Number is less than one.)

7. 1.1,800,000,000 2.200,000 3.154,000,000 4.0.023 5.0.000000432 6.0.05 7.134,555,000 8.0.13 9.234,000.0 10.930,000,000 11.111,000 12.0.0009 13.444,000,000 14.0.000000025 1.1.8 X 10 9 2.2.0 X 10 5 3.1.54 X 10 8 4.2.3 X 10 -2 5.4.32 X 10 -7 6.5.0 X 10 -2 7.1.34 X 10 8 8.1.3 X 10 -1 9.2.34 X 10 5 10.9.30 X 10 8 11.1.11 X 10 5 12.9.0 X 10 -4 13.4.44 X 10 8 14.2.5 X 10 -8

8. How to make metric measurements

9. 1cm 3 254 2 cm Measure using centimeters.

10. 1cm 3 254 2.5 cm Measure using centimeters.

11. 1cm 3 254 3.2 cm Measure using centimeters.

12. 1cm 3 254 0.5 cm Measure using centimeters.

13. 1cm 3 254 51 mm Measure using millimeters.

14. 1cm 3 254 25 mm Measure using millimeters.