| 摘要 |
The present invention relates to a sphere on which the earth is printed, and comprises electric wires wound into the shapes of an outer sphere and inner sphere; and a compass interposed between the outer surface on which the Earth is printed and the electric wire wound into the shape of the outer sphere, thereby enabling users to understand not only the determination on the polarity ('N','S') of North Pole and the South Pole, but also various physical phenomena occurring on the Earth, such as the generation, shapes, disappearance, and reversal of the Earth's magnetic field. |
