Ключевые слова: africa, african continent, astronomy, australia continent, axis of rotation, blue, business, class, continent, day, day and night, daytime, earth, earths axis, eco, ecology, economic, environment, float, global, globe, illuminated, learning tools, light, map, night, pacific, planet, rotate, rotation, school, science, sea, shadow, society, solar light, space, sphere, spin, sun, turning, world,