The Basics of Units of Measurement

We discuss the basics of units of measurement. What are the international standards for measuring. We cover the seven basic units and some derived units. How is a meter defined? Is the standard kilogram still a large chunk of metal? Is a kilogram measuring mass or weight? What is a joule? What is a gigawatt? Did Back to the Future contain scientific inaccuracies? Come find out how measurement units can help you understand the physical sciences.