Demonstration Compass (0825) Specifications : Size: 16 x 3 cm (dia. x height) – Magnetic needle: 10 cm length. Our Demonstration Compass consists of a simple magnetic needle on a compass map. Our compass makes it extremely easy to demonstrate the cardinal points of a compass and determine all their directions. LAWS & PRINCIPLES INVESTIGATED : • Investigating Earth’s magnetic field • What are the cardinal points? • The compass point and winds direction experiments Qty :