Xi' an solar terms

Summer solstice? 0? (4 points)

(2) the Tropic of Cancer and its northern area (2 points)

(3)23 26ˊ? (2 points)

(4) 23 26 ˊ n—66 34 ˊ s, 90 N (or between the

Summer solstice? 0? (4 points)

(2) the Tropic of Cancer and its northern area (2 points)

(3)23 26ˊ? (2 points)

(4) 23 26 ˊ n—66 34 ˊ s, 90 N (or between the Tropic of Cancer and the Antarctic Circle and the North Pole) (2 points).

Test analysis:

(1) According to the graphic analysis, the day in the northern hemisphere is longer than the night, and the day in the Arctic Circle reaches 24 hours, indicating that the direct point of the sun is located in the Tropic of Cancer, so the solar term in Xi 'an is the summer solstice. The China Antarctic Zhongshan Station (69 22 ˊ) has a daily length of 0 hours.

(2) On that day, the sun is pointing to the Tropic of Cancer, so the area where the sun's height reaches the maximum in a year at noon is the Tropic of Cancer and its north.

(3) The key to calculate the noon sun height is to calculate the distance to the direct point. There is direct sunlight at point M. The latitude difference between m and k is 23 26 ˊ. So at this time, the noon sun height difference between M and K is about 23 26 ˊ.

(4) All directions of the North Pole are south, so on this day, the latitude range of the afternoon shadow facing south is between the Tropic of Cancer and the Antarctic Circle and the North Pole.

Comments: According to the different revolutionary positions of the earth, the vernal equinox and autumnal equinox are divided into two days, in which the sun shines directly on the equator, the tropic of cancer shines directly on the summer solstice, and the tropic of cancer shines directly on the winter solstice.