Asked by Bob
Why are temperatures more moderate around the fall and spring equinoxes?
The angle at which Earth’s axis tilts changes.
Neither end of Earth’s axis is tilted toward the Sun.
The north end of Earth’s axis is tilted toward the Sun.
The Earth briefly wobbles on its axis.
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Answered by
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Correct choice: Neither end of Earth’s axis is tilted toward the Sun.
Explanation: At the equinoxes the Sun is directly over the equator, so both hemispheres receive about equal daylight and the Sun’s rays strike at intermediate angles. That produces milder temperatures compared with the solstices, when one hemisphere is tilted toward the Sun (more direct sunlight and longer days) or away from it (less direct sunlight and shorter days). The tilt’s magnitude (~23.5°) doesn’t change rapidly, and any axial wobble is negligible for the seasonal effect.
Explanation: At the equinoxes the Sun is directly over the equator, so both hemispheres receive about equal daylight and the Sun’s rays strike at intermediate angles. That produces milder temperatures compared with the solstices, when one hemisphere is tilted toward the Sun (more direct sunlight and longer days) or away from it (less direct sunlight and shorter days). The tilt’s magnitude (~23.5°) doesn’t change rapidly, and any axial wobble is negligible for the seasonal effect.
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