Explain what the Metric System is. Also find the year the metric system was invented and the country where it happened.
The Metric System or the "International System Of Units' was set up in France in 1791 and gradually became the accepted norm for most countries.
According to the US CIA World Factbook in 2006, the International System of Units is the official system of measurement for all nations except for Myanmar, Liberia, and the United States.
Just do a Google search for "metric system" and you will get an abundance of information.