1. Conversions Converting From One System of Units to Another
You will need a conversion factor like ( 1 meter = 3.28 ft).
It can be used two ways:
(1m/3.21ft) or ( 3.21ft/1m)
Multiply your given dimension by the conversion factor to obtain the desired dimension.
How many feet in 2 meters? m (3.21ft/m) = 6.42 feet
How many meters in 10 feet? ft(1m/3.21ft) = 3.11 meters

2. Converting Areas
To convert areas, you must square the conversion factor.
Conversion factor: 1 inch = 2.54cm
A page is 8.5 inches by 11 inches. What is the area in square centimeters?
The area in square inches is 95 in2. So……
95 in2 = __________cm2
95 in2(2.54cm/1 in)2 = 95(6.45 cm2) / (1 in2) = 613 cm2

3. Converting Volumes
To convert volumes, you must cube the conversion factor.
A cubic foot is how many cubic inches?
Conversion factor: 1 foot = 12 inches
1 ft 3 ( 12 in/ 1 ft)3 = 1 ft 3 ( 123 in3/ 13 ft3) = 288in3

4. Using S.I. Prefixes

5. Examples 12nm = 12 x 10-9 m Finished. Change 12nm to meters.
n = x 10-9 so replace it:
12nm = 12 x 10-9 m Finished.

6. Examples 250g ( 1 kg/1x103 g) = .250 kg Change 250 grams to kilograms.
1 kg = 1x103 gram
250g ( 1 kg/1x103 g) = kg

7. Application – Student Heights
Get the Data :
1. Break into groups of 4 or 5.
2. Obtain a meter stick.
3. Measure and record on a sheet of paper, the height of each group
member in centimeters (cm).
4. Write you measurements on the board. Each group will do this so
when each group is finished, the heights of the entire class will be
on the board.

8. Application – Student Heights
Analys
Application – Student Heights
Each student will complete the following:
1. Make a table of the heights of all of the students.
Show the units at the top.
2. Find the average height in centimeters.
3. Find the range in centimeters.
4. Convert the average height and range to meters.
5. Convert the average height and range to feet.
6. Convert the average height and range to inches.
Conversion factors: 1 inch = 2.54cm inches = 1 foot meter = 100cm

9. What To Turn In Sample Table Your table of the heights in cm.
Average Height = _______cm
Range = _______cm
C. Average Height = _______m
Range = _______m
D. Average Height = _______ft.
Range = _______ft.
Average Height = _______in.
Range = _______in.
Student Height (cm) 1 2 3 4 5 6 …