1. MEASUREMENT

2. Determination of amount of something
Measurement
Determination of amount of something
Number value and a unit
Unit –
standard amount that
everyone agrees with

3. Only 2-3 Countries use this
ENGLISH SYSTEM
United States
Common measurements
Miles, yards, feet, inches, pounds, pints, quarts, gallons, cups, teaspoon
Only 2-3 Countries use this
(its an old system)

4. International System of Units ”SI”
Metric system
created in 1800’s in France
Relates all units to form a base of 10
1960 named SI
U.S. is the only industrialized nation
not to adopt the SI

5. “SI” base units Length - meters Mass - grams Volume - liters
Temperature - Kelvin or Celsius

6. UNCERTAINTY
All physical measurements are to some extent uncertain. The degree of percision is indicated by SIGNIFICANT FIGURES

9. Metric Conversions Ladder Method
T. Trimpe

10. How many jumps does it take?
Ladder Method 1 2 3
KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.
4 km = _________ m
Starting Point
Ending Point
How many jumps does it take? 4. 1
__. 2
__. 3
__.
= 4000 m

11. Conversion Practice

12. UNCERTAINTY
All physical measurements are to some extent uncertain. The degree of precision is indicated by SIGNIFICANT FIGURES

13. Metric Conversion Challenge
Write the correct abbreviation for each metric unit.
1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____
2) Meter _____ 5) Millimeter _____ 8) Centimeter _____
3) Gram _____ 6) Liter _____ 9) Milligram _____
Problems:
How many milliliters are in a liter?
2) How many centimeters are in a meter?   
3) How many kilometers are in a meter?
4) How many centimeters are in a kilometer?
5) How many kilometers are in a centimeter?

14. Try these conversions, using the ladder method.
1) 1000 mg = _______ g 6) 1 L = _______ mL 11) 160 cm = _______ mm
2) 14 km = _______ m 7) 109 g = _______ kg 12) 250 m = _______ km

17. SI - length Meters 1 kilometer (km) = 1,000 meters (103)
1 hectometer (hm) = 100 meters (102)
1 decameter (da) = 10 meters (101)
1 meter
10 decimeters (dm) = 1 meter (10-1)
100 centimeters (cm) = 1 meter (10-2)
1,000 millimeters (mm) = 1 meter (10-3)

18. SI - Mass Grams (usually in kg) 1 kilogram (kg) = 1,000 grams (103)
1 hectogram (hg) = 100 grams (102)
1 decagram (dag) = 10 grams (101)
1 gram
10 decigram (dg) = 1 gram (10-1)
100 centigram (cg) = 1 gram (10-2)
1,000 milligram (mg) = 1 gram (10-3)
(usually in kg)

19. SI - Volume Liters 1 kiloLiter (kL) = 1,000 liters (103)
1 hectoLiter (hL) = 100 liters (102)
1 decaLiter (daL) = 10 liters (101)
1 Liter
10 deciLiter (dL) = 1 liters (10-1)
100 centiLiter (cL) = 1 liters (10-2)
1,000 milliLiter (mL) = 1 liters (10-3)

20. SI - Temperature 210 C = room temperature
Celsius (0C) = 1000 C boiling water
00 C freezing water

22. Dimensional Analysis Given | needed| = | |
| |
Ex. Convert 10 meters into kilometers
10 meters is given
Kilometers is needed
10 m | 1 km | = km = 0.01 km
| 1,000 m | 1,000