Make Ferrofluid

Sarah Santos and Jeremy Rector demonstrate two ways to make ferrofluid during a live Webcast of the Exploratorium's Iron Science Teacher.

Watch the whole episode (type "oil" in the search box), along with many other episodes of Iron Science Teacher at

The Iron Science Teacher competition showcases middle school and high school science teachers or the Exploratorium's own teaching staff as they devise demonstrations involving a particular ingredient—an everyday item such as a plastic bag, a milk carton, or in this case oil. In a fast-paced atmosphere where showmanship and creativity reign, science teachers have ten minutes to concoct a science activity that can be used in the classroom.
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