Read the Schematic Diagram of the Earth's Revolution and answer this question. (1) Write the solar terms in the northern hemisphere when the earth revolves to positions A, B, C and D: A _ _ _ _ _ B _

Read the Schematic Diagram of the Earth's Revolution and answer this question. (1) Write the solar terms in the northern hemisphere when the earth revolves to positions A, B, C and D: A _ _ _ _ _ B _ _ _ _ _ (1) As can be seen from the schematic diagram of the earth's revolution, when the earth revolves to position A, the sun shines directly at the equator, which is the vernal equinox in the northern hemisphere; When the earth revolves to position B, the sun shines directly on the Tropic of Capricorn, which is the winter solstice in the northern hemisphere. When the earth revolves to position C, the sun shines directly at the equator, which is the autumn equinox in the northern hemisphere.

(2) As can be seen from the schematic diagram of the earth's revolution, when the earth revolves to the D position, the sun directly shines on the Tropic of Cancer, which is the summer solstice in the northern hemisphere, and at this time, the polar sun phenomenon appears in the Arctic Circle.

(3) When the earth revolves to position B, the sun shines directly on the tropic of Capricorn, which is the winter solstice in the northern hemisphere, and the time is around 65438+February 22nd. At this time, Nankang City in the northern hemisphere has the shortest day and the longest night.

(4) When the earth's revolution is in position D, the sun shines directly on the Tropic of Cancer, when it is summer in the northern hemisphere and winter in the southern hemisphere.

(5) Due to the revolution of the earth, the temperate zone has obvious seasonal changes.

So, the answer is: (1) vernal equinox; Solstice of winter; Vernal equinox; Summer solstice; (2) Tropic of Cancer; Extreme day; (3) 12; 22; (4)D； (5) season.