In the meantime, a new system of weights and measures, developed by French scientists following the Revolution of 1789, gained increasing international use. This metric system had as its fundamental ...

All countries use the metric system to varying degrees. Most of the world has adopted the metric system as their official system of measurement with one major exception: the United States.

Units from the metric system can be used to describe the mass ... that are weighed in grams and kilograms. A double number line is a useful tool to use when you want to convert between grams ...