Units Of Measurement I Units of Measurement A

I. Units of Measurement A. What measurement system is used in all disciplines of

C. Metric System prefixes: Prefix Symbol Meaning Multiple kilo k thousand 1000 hecto h

Use the following for metric conversions: 1 giga = 1, 000, 000 1 mega=

D. Accuracy and Precision 1. Accuracy – How close a measurement is to the

E. Scientific Notation 1. A way to express very large or very small numbers

1. 1, 800, 000 1. 8 X 109 2. 200, 000 2. 0 X

Measure using centimeters. 1 cm 2. 5 cm 2 3 4 5

Measure using centimeters. 1 cm 3. 2 cm 2 3 4 5

Measure using centimeters. 1 cm 0. 5 cm 2 3 4 5

Measure using millimeters. 1 cm 51 mm 2 3 4 5

Measure using millimeters. 1 cm 25 mm 2 3 4 5

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Units Of Measurement

I. Units of Measurement A. What measurement system is used in all disciplines of science? 1. WHY? B. Base Units Quantity Unit Abbreviation Length Meter m Mass Kilogram kg Time Second s Temperature Kelvin K Electric Current Ampere A Amount of Substance Mole mol Luminous Intensity Candela cd

C. Metric System prefixes: Prefix Symbol Meaning Multiple kilo k thousand 1000 hecto h hundred 100 deka da ten 10 In between: Greater Than One meter - length gram - mass liter - volume Prefix Symbol Meaning Multiple deci d tenth 0. 1 centi c hundredth 0. 01 milli m thousandth 0. 001 Smaller Than One

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

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

E. Scientific Notation 1. A way to express very large or very small numbers 265, 000 2. 65 x 105 HOW a. 1. Find the decimal b. Count Negative (Number is less than one. ) Positive (Number is greater than one. )

1. 1, 800, 000 1. 8 X 109 2. 200, 000 2. 0 X 105 3. 154, 000 3. 1. 54 X 108 4. 0. 023 4. 2. 3 X 10 -2 5. 0. 000000432 5. 4. 32 X 10 -7 6. 0. 05 6. 5. 0 X 10 -2 7. 134, 555, 000 7. 1. 34 X 108 8. 0. 13 8. 1. 3 X 10 -1 9. 234, 000. 0 9. 2. 34 X 105 10. 930, 000 10. 9. 30 X 108 11. 111, 000 11. 1. 11 X 105 12. 0. 0009 12. 9. 0 X 10 -4 13. 444, 000 13. 4. 44 X 108 14. 0. 000000025 14. 2. 5 X 10 -8

How to make metric measurements

Measure using centimeters. 1 cm 2 3 4 5

Measure using centimeters. 1 cm 2. 5 cm 2 3 4 5

Measure using centimeters. 1 cm 3. 2 cm 2 3 4 5

Measure using centimeters. 1 cm 0. 5 cm 2 3 4 5

Measure using millimeters. 1 cm 51 mm 2 3 4 5

Measure using millimeters. 1 cm 25 mm 2 3 4 5