极昼与极夜
Midnight Sun & Polar Night
知道在极地，白天和黑夜的情况非常特别：夏天太阳几乎不会落下（极昼），冬天太阳好几个月都不升起（极夜）。这和我们住的地方很不一样，我们这里每天都有白天和黑夜。
Know that at the poles, daylight and darkness are extreme — in summer the Sun never fully sets (midnight sun) and in winter the Sun never rises (polar night lasting months) — and that this is very different from what we experience at home, where every day has both daylight and darkness
学习证据 / Evidence
- 描述极昼：在极地的夏天，太阳整天整夜都在地平线以上。
- 描述极夜：在极地的冬天，太阳连续几周或几个月都在地平线以下。
- 把这种现象和家里平时白天黑夜的规律作比较，指出两者差别非常大。
- Describe midnight sun: in polar summer, the Sun stays above the horizon all day and night
- Describe polar night: in polar winter, the Sun stays below the horizon for weeks or months
- Compare this to normal day-night patterns at home, noting the dramatic difference
评估问题 / Assessment
{{name}}知道这个奇妙的事实吗？在极地，夏天太阳一直不落，冬天太阳一直不升，所以可能会有连续几个月的白天，或者连续几个月的黑夜？
Does {{name}} know the amazing fact that at the poles, the Sun doesn't set at all in summer and doesn't rise at all in winter — so there can be months of daylight or months of darkness?