The definition of a kilogram changes in 2018. A video discusses the current definition of a kg and why scientists need to change it. Then, it explains the science behind the process of redefining it.
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- Review how to solve equations for different variables if pupils are not all confident in the process
- Discuss the ways scientists previously defined other standard units and how they define them now
- Relies on prior knowledge of Avogadro's number and Planck's constant
- Includes subtitles in seven languages for English learners
- Provides clear diagrams of sophisticated scientific equipment