Fill in the solar terms in the northern hemisphere when the earth revolves to A and B, a _ _ _ _ _ _ _ _b _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Fill in the solar terms in the northern hemisphere when the earth revolves to A and B, a _ _ _ _ _ _ _ _b _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Look at the map and it shows (1) that the revolution direction of the earth is from west to east. ② The revolution of the earth to A is the winter solstice in the northern hemisphere, and the date is about 65438+February 22nd. ? Rotating to b is the vernal equinox in the northern hemisphere, which is around March 2 1; The revolution to c is the summer solstice in the northern hemisphere, and the date is around June 22; Rotating to D is the autumn equinox in the northern hemisphere, and the date is around September 23rd. (3) When the earth revolves to A, the sun shines directly on the tropic of Capricorn, and the days in the northern hemisphere are short and the nights are long. The date is about February 22, 65438. (4) Because of the revolution of the earth, the four seasons change. So the answer is: (1. (2) Solstice in winter; Vernal equinox; Summer solstice; Autumnal equinox; (3) Tropic of Capricorn; The days are short and the nights are long; 65438+around February 22nd; (4) Four seasons.