Learning Sheet for the movement of celestial

摘要

PURPOSE: A learning sheet for the movement of a heavenly body is provided to improve a learning effect of the principles of the rotation and revolution of the earth by schematizing time change and day change according the rotation and revolution of the earth. CONSTITUTION: A heavenly body plate includes a date maker(11). The date cover indicates 1 year, 12 moons, and 365 days. An earth revolution board(5) is fixed on the heavenly body plate. The earth revolution board revolves around the central line of the date cover. The earth revolution board comprises a time marker(15). The time marker indicates 1 day as 24 hours. An earth rotation board(7) is fixed on the earth revolution board. The earth rotation board revolves the around the time marker.