Traditional Culture Encyclopedia - The 24 Solar Terms - geography ................
geography ................
2 the answer to the fifth question: D. Winter solstice, reasons: First, notice that two of the four figures of the length measured by the four solar terms in the picture are the same. According to the knowledge of the solar altitude angle in the base area, the maximum value of the solar altitude angle appears at noon from summer to Sunday, and the minimum value appears at noon from winter to Sunday. At noon, the greater the altitude angle of the sun, the shorter the shadow length of the object at noon, and vice versa. At the vernal equinox and autumnal equinox, the direct point of the midday sun is on the equator, so the height angle of the midday sun is equal, so the shadow length of the object is equal. Therefore, according to the above knowledge, it can be concluded that the solar terms measured in the picture are spring equinox, summer solstice, autumn equinox and winter solstice in turn.
The answer to the sixth question: D Guangdong, the reason: pay attention to the figure about the shadow length in the dry map. There is a solar term with a shadow length of 0 at noon, so we can know that the sun's rays at this time make an angle of 90 degrees with the local ground, so the sun can directly reach this place at noon on the day of this solar term. From the above questions, we can know that this solar term is the summer solstice, and we know that the latitude range of direct solar energy is 23.26 degrees N ~ ~ 23. Finally, according to the above knowledge, only the provinces and municipalities directly under the central government where D is in the direct range of the sun and Guangdong meet the requirements, so D is chosen.
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