A ferrofluid, or liquid magnet, is a colloidal mixture of magnetic particles in a liquid. When no magnetic field is present, the fluid is not magnetic and the orientation of the magnetic particles is random. When an external magnetic field is applied, the magnetic particles align with the magnetic field lines. The down and dirty, quick version of this lab is much simpler. You are going to mix oil and iron filings together in a petri dish. When a magnet is placed under the mixture, cool spikes pop up into the air.
Demo Pack includes: 1 oz. oil, 7/8 oz. iron filings, 1 petri dish, 1 book magnet
Study Group Pack includes: 4 1-oz. oil, 4 7/8-oz. iron filings, 4 petri dishes, 4 book magnets
Classroom Pack includes: 10 1-oz. oil, 10 7/8-oz. iron filings, 10 petri dishes, 10 book magnets
Find the Lesson Plan Here