Teams work as material engineers to create ferrofluids, whose shape is influenced by magnetic fields. The activity, which is the fourth in the six-part series, has the teams create magnetic ink and use it to write, testing it with a magnet afterward. The groups continue to observe the fluid with and without the influence of a magnet and document their observations.

Concepts

fluids, magnetic fields, magnetic force, nanotechnology, magnetism, technology resources

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Instructional Ideas

• Research some uses of magnetic fluids

Classroom Considerations

• The class should have a basic introduction to nanotechnology, characteristics, and applications
• Activity requires several materials and scientific equipment 

Pros

• Provides step-by-step instructions
• The materials list gives suggestions on where you can find certain materials

Cons

• None