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Metric and Measurements
Unit 1: Science Process Skills
Physical Science
Steinbrink
English System
Measurement system practiced in the United States.
The U.S. is the only industrialized, developed nation to not use Metric
Interesting Facts
The U.S. failed to adopt the metric system as its unit of measurement by one vote in the Continental Congress in the 1770s
Mars Climate Probe
In 1999 NASA scientists and Lockhead scientists assumed each were using the respective units and the probe was lost at a cost of $125 million
One team was working in English measurements while the other was working in metric.
Making the Switch to Metric…
Metric System
The metric system deals with the following units:
Length = Meter
Mass = Gram
Volume = Liter
Most commonly practiced system in the world—95% of the world uses metric
Le Systeme Internationale
Le Systeme Internationale was adopted in 1960.
Based on the metric system, SI is a comprehensive system of units
SI system uses prefixes to make the metric system units more practical
Used by scientists
SI versus Metric
Metric only deals with the base unit of measurement where as SI adds prefixes to the base units to adjust the size.
Example: metric--grams SI -- centigrams,
milligrams
Metric Prefixes
Kilo….Hecto…Deka…base…deci…centi…milli
King
Henry
Died
by
drinking
chocolate
milk
The End