Solar term revolution of the earth

(1)A summer solstice b autumnal equinox c winter solstice d vernal equinox

(2) Tropic of Cancer? Unequal (3) Equator is equal? (4) 12 1 2

Test and analysis: (1) The names of solar terms represented by letters in the figure: A is summer solstice, June 22nd, B is autumn equinox, September 23rd, C is winter solstice, 65438+February 22nd, D is spring equinox, March 22nd, 21; (2) When the earth revolves to position A, the sun shines directly on the Tropic of Cancer, and the length of day and night varies in China. (3) When the earth revolves to position B, the sun shines directly on the equator, and the length of day and night in China is equal. (4) When the earth revolves to position C, the winter months in the northern hemisphere are 65438+February, 65438+ 10 and February.

Comments: This question can also examine the basic knowledge of rotation and revolution. In the northern hemisphere, spring is March to May, summer is June to August, autumn is September to165438+1October, and winter is June to February. The months in the southern hemisphere remain the same, but the seasons are opposite. The five regions of the earth. Geographical phenomena caused by the earth's movement: alternation of day and night, morning and evening, length and change of day and night, change and shadow of the height of the sun at noon.