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【基本知识点】1.地球的自转规律:地方时东早西晚,经度每相隔15°,地方时相差1 小时。2.经度相同则地方时相同。3.日界线(或者说该线两侧日期不同)有两条:一条国际日期变更线,大致与180°经线重合,这是在地球表面固定的,东晚西早;另一条在地球表面是活动的,即0 时所在的经线,东早西晚。【引申知识点】1.春分、秋分日全球昼夜等长→晨昏线与经线重合→日出(晨线所在的
[Basic knowledge points] 1. Earth’s rotation pattern: when the place is east and west and west, the longitude is separated by 15° and the local time is 1 hour. 2. When the longitude is the same, the place is the same. 3. There are two date lines (or different dates on both sides of the line): an international date line that roughly coincides with the 180° warp line, which is fixed on the surface of the Earth, east, west, and west; another is on the surface of the Earth. Active, that is, the warp at 0 o’clock, early morning and late night. 【Expansion Knowledge】1. Equinox, Equinox Day, Day/Night, etc.→Twilight Lines and Warp Lines→Sunrise (where the Morning Line is)