Composite balloon element

A summer solstice? Winter solstice

(2) the equator, equal to day and night, autumn.

(3) Sketch

Test analysis:

(1) From the schematic diagram of

A summer solstice? Winter solstice

(2) the equator, equal to day and night, autumn.

(3) Sketch

Test analysis:

(1) From the schematic diagram of the earth's revolution, it can be seen that the extreme day near the North Pole at position A is the summer solstice in the northern hemisphere, and the extreme night near the North Pole at position B is the winter solstice in the northern hemisphere.

(2) When the earth revolves to the position of vernal equinox, the sun shines directly on the equator, and the global day and night are equal in length. When it is spring in the northern hemisphere, it is autumn in the northern hemisphere.

(3) The revolution direction of the earth is from west to east. As long as the drawn arrow can be formed counterclockwise.

Comments: The solar terms produced by the revolution of the earth generally refer to the solar terms in the northern hemisphere. Judging solar terms can be judged according to the extreme day and night conditions near the north and south poles of the earth; The seasons in the northern and southern hemispheres are opposite, and it is easy to judge in winter and summer, but it is easy to make mistakes in spring and autumn, so students need to pay attention to this knowledge when studying; The drawing of the earth's revolution direction can only form counterclockwise rotation on the revolution orbit.