★0.0
Un mètre pour mesurer le monde
★8.2
The Time Factory
Who invented time, who invented the clock? Why 1 hour, why 60 minutes, why 60 seconds? Since prehistoric times, man has sought to measure time, to organize social and religious life, to plan food supply... Today we can surf the Internet, geolocate, pay by credit card… All our daily lives depend on time and the synchronization of clocks. The history of the invention of time and of the ways and instruments to measure it is a long story…
★0.0
Let's Measure: Using Standard Units
A young boy is taught the wonder of standard unit of measurement by the world's greatest superhero: Measuring Man!
★0.0
Measurement in Physical Science
Illustrates principles for measuring distance, mass and time--the basic quantities in physical science. Emphasizes the importance of accuracy. Provides laboratory demonstrations.