Napoleon had the metric system developed because every country he conquered had a different measuring system. From there it spread all over the world. French, Spanish, Italian, and German colonies used it. Metric is all based on 10's.
You start with a millimeter; 10 millimeters is a centimeter. 100 centimeters or 1,000 millimeters is a meter (a little longer than a yard), 1,000 meters is a kilometer (about a half mile).
1 cubic centimeter is a gram of water. 1,000 grams is a kilogram dry weight (2.2 lbs) or 1 liter of water. 1,000 liters of water is a metric ton (about 2,200 lbs).
Anything less than 1 liter of liquid weight is a milliliter or say 1 cup is about 300 milliters (ml)
Not hard to remember. Each wrench metric is based on millimeters. So the higher mm the larger the wrench.
In metric heat and cold, 0 degrees is freezing or 32 F. 100 degrees is boiling or 212 degrees F. There is also the Rankin temperature scale, and the Kelvin scale used in physics and space. 0 in Kelvin is absolute zero where everything freezes and nothing can get colder. This is like deep space far away from the sun or any star.
Fahrenheit was developed first by a Dutch scientist in the 1600's. Most countries have switched to Centigrade metric scale because water is identifiable easier. Kelvin will eventually win out if our species becomes seriously space bearing, like Startrek or Starwars, due to space being so cold between stars.
Eventually we will have to go metric if we continue to trade with other countries.
You had me until you made Star Trek and Star Wars one word each.
Zero credibility.
P
