Solar term illumination judgment

(1) winter solstice? Good morning. (2 points)? (2)E？ 6? (2 points)

(3)66.5? (2 points) (4)8? (2 points)

(5) Painting: The sun shines from one side of the solar hemisphere, perpendicular to the termination line. ? (2 points)

Test analysis:

Question (1), according to the picture, there are polar nights in the Arctic Circle, and the sun shines directly on the tropic of Capricorn, so the solar term is winter solstice; The EF line can be judged as the morning line by the rotation method (along the direction of the earth's rotation, crossing the line into the daytime hemisphere is the morning line, and vice versa is the dark line).

Question (2), Is the noon sun height equal to 0? That is to say, the polar night has just appeared in this place, the sun is directly in the tropic of Capricorn, and the Arctic Circle is the area where the polar night has just appeared, so the noon sun height in E is equal to 0? . D is located at the equator, and it is divided equally day and night throughout the year, with sunrise at 6 o'clock and sunset at 18 o'clock. So it's 6 o'clock when the sun rises at point D.

Question (3), D is at the equator and the sun is directly on the tropic of Capricorn. According to the calculation method of noon sun height, the noon sun height is-90 latitude difference (latitude interval), which can be obtained as 90-(23 26'-0)-60.

Question (4): At this moment, point C is on the morning line, just like sunrise. The side view is divided into six equal parts according to the longitude, each equal part is 30, and the point C is on the 30 meridian on the east side of the intersection of the morning line and the equator (6 o'clock local time), so the local time at point C is 8 o'clock, that is, the sunrise at 8 o'clock at point C is 2 hours later than 6 o'clock, and the sunset at point C is 2 hours earlier than 18, that is, the sunset at 16 o'clock. When the computable day length is16-8 = 8.

Question (5)? .

Comments: The content of this research group is comprehensive. For this kind of questions, students should strengthen their grasp of the topic information. The key to solving this problem group is that students should master the relevant laws of termination line, solar terms, noon sun height, length of day and night, and illumination map.