There are two measurement systems used in the United States: the English or U.S. customary system and the metric system. A measurement system consists of units, which are defined in specific ways, and their symbols. Within a system, there are relationships between units, such as between inches and feet in the English system or centimeters and meters in the metric system. In a coherent measuring system, a small number of independent units fit together in simple ways, and all other units are defined in terms of the base units. The metric system is almost completely coherent, whereas the English system is not coherent at all! In this session, you will learn about the metric system. Note 1
For the list of materials that are required and/or optional in this session,
see Note 2.
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