Testing Which Metals Are Magnetic

Next Generation Science

This concise science demonstration investigates the relationship between magnets and various metal objects to determine which materials possess magnetic properties. Through a clear, step-by-step experiment, the narrator tests common household items—like keys, coins, and safety pins—against a U-shaped magnet. The video explicitly tests the hypothesis that "all metals are magnetic" by showing that while all the test objects are metallic, only some interact with the magnet. The core themes explore the physical properties of matter, specifically magnetism and material composition. It introduces the fundamental scientific concept that magnetism is a property specific to certain metals (ferromagnetic materials) rather than a general property of all metals. The video concludes by identifying specific elements—iron, nickel, and cobalt—that are magnetic, contrasting them with non-magnetic metals like aluminum, copper, and silver. For educators, this video serves as an excellent hook or demonstration for units on physical science and properties of matter. It directly addresses the common student misconception that magnets stick to all metals. The clear visual evidence of the key and coin failing to stick provides a memorable "discrepant event" that sparks inquiry. It lays the groundwork for understanding material composition and classification, making it valuable for early elementary science curriculums.