12. What else do we need to measure?
Length
Volume
Weight (mass)
Temperature
Angles
Time
Speed (length per time)
1 milliliter of water fits perfectly in
1 cubic centimeter at 4º Celsius.
And it’s mass is exactly 1 gram.
14. Map of Metric usage
Countries by date of metrication.
Green = by 1800, yellow = by 1900, red = by 1980
Black = Countries that have not adopted the metric
system as the primary measurement system.