Read the schematic diagram of the earth's revolution and complete the following table: solar term date, direct position of the sun, length of day and night (northern hemisphere), whether there is extr

Read the schematic diagram of the earth's revolution and complete the following table: solar term date, direct position of the sun, length of day and night (northern hemisphere), whether there is extreme day and night. As can be seen from the picture, when the earth revolves to ①, the sun shines directly on the Tropic of Cancer, which is the summer solstice in the northern hemisphere, and the time is around June 22nd. At this time, the days in the northern hemisphere are long and the nights are short, and the Arctic Circle is extremely daytime. When the earth revolves to ②, the sun shines directly on the equator, which is the vernal equinox in the northern hemisphere, and the time is around 2 1 on March, when the world is divided equally between day and night. When the earth revolves to ③, the sun shines directly on the Tropic of Capricorn, which is the winter solstice in the northern hemisphere, and the time is around 65438+February 22nd. At this time, the days in the northern hemisphere are short and the nights are long, and the phenomenon of extreme night appears in the Arctic Circle. When the earth revolves to ④, the sun shines directly on the equator. At this time, it is the autumn equinox in the northern hemisphere, and the time is around September 23rd, and the world is divided equally between day and night.

So the answer is:

Solar term date, direct position of the sun, length of day and night

(northern hemisphere)? Are there extreme days and nights? ① From summer solstice to June 22nd, the Tropic of Cancer has long days and short nights. Extreme solar phenomena appeared in the northern Arctic Circle. ② Day and night balance of equator on March 2 1 day. ③ From winter solstice to June 22nd, the Tropic of Cancer has short days and long nights. ④ On September 23rd, the equator was balanced day and night, and the autumnal equinox was absent.