🧲 Magnetism

The Invisible Force of Magnetism

Magnetism is an invisible force that children find endlessly fascinating — and it is one of the fundamental forces that shape our universe. From the compass that guided ancient navigators to the hard drives that store digital data, magnets are woven into daily life in ways most people never notice. This interactive explorer lets students experiment with magnetic poles, attraction, repulsion, and magnetic fields without needing a physical magnet set.

What makes magnetism especially valuable for science education is that it teaches students to reason about invisible forces. Unlike gravity (which always pulls down) or friction (which students can feel), magnetism can both attract and repel, acts at a distance, and passes through some materials but not others. Learning to observe, predict, and explain magnetic behavior builds the scientific reasoning skills that transfer to studying all invisible forces.

Key Concepts to Explore

Start with the fundamental rule: opposite poles attract, like poles repel. Then explore which materials are magnetic (iron, steel, nickel, cobalt) and which are not (aluminum, copper, wood, plastic). Students are often surprised that not all metals are magnetic — a discovery that challenges assumptions and teaches careful observation. Next, investigate magnetic fields: how does distance affect magnetic strength? How can you see the shape of a magnetic field using iron filings?

Connect magnetism to Earth science: our planet is a giant magnet with a magnetic field that extends thousands of miles into space, protecting us from harmful solar radiation and enabling compass navigation. This connection transforms magnetism from a tabletop curiosity into a planetary-scale phenomenon with real consequences for life on Earth.

Last reviewed: May 2026 · Aligned with NGSS 3-PS2-3, 3-PS2-4