1. Science and Measurement
Chapter 1.3
The Foundations of Physical Science

2. Unit Conversion Why convert?
Suppose you have a jar full of pennies and you count out 1565 pennies. You have 1565 cents-- but wouldn’t you rather know the dollar amount?
You just move the decimal over two places to the left. It is $15.65 but it represents the same amount of money

3. Converting SI Units
SI conversion is just as easy as changing pennies into dollars
There is a saying that will help you remember an easy way to convert within the metric system
King Henry Drinks Up Delicious Chocolate Milk

4. Let’s Practice Convert 650 millimeters to meters
Convert 142 kilometers to meters
Convert 754,000 centimeters to kilometers

5. SI Estimation Challenge
Which is realistic
Width of a postage stamp
1m, 15cm, or 20mm
Thickness of a CD
0.1m, 0.01m or 0.001m
Height of a bus
152.4mm, 20m, or 250cm
Length of a worm
25.4mm. 25.4cm, or 0.254m
Length of a football field
91.44m, 200m, 1km

6. Converting Between English and SI Units
Here are some handy conversion factors
2.54 cm = 1 inch
1.609 km = 1 mile
30.48 cm = 1 foot
39.37 in = 1 meter