In a career that lasted seven decades, Max Planck achieved an enduring legacy with groundbreaking discoveries involving the relationship between heat and energy, but he is most remembered as the founder of the "quantum theory."

A well illustrated activity where students make a simple compass. Includes facts about compasses.

An activity where students investigate how much iron is in a sample of breakfast cereal.

A well illustrated activity where students investigate and draw the magnetic field lines created with a bar magnet and a compass.

An interesting activity where students make a ferrofluid (a liquid with magnetic particles floating in it) and explore how it responds to a magnetic field. Well illustrated.