How Does Autumn and Spring Occur?
The Tilt of the Earth's Axis Is the Most Important Reason Why Seasons Occur. .. . the Tilt of the Earth Means the Earth Will Lean Towards the Sun (Summer) or...
The tilt of the Earth's AXIS is the most important reason why seasons occur. ... The tilt of the Earth means the Earth will lean towards the Sun (Summer) or lean away from the Sun (Winter) 6 months later. In between these, Spring and Autumn will occur.
How are autumn and spring caused?
In spring and autumn the planet isn't tilted towards or away from the Sun — it's roughly side-on. And for two days each year the Earth's tilt is exactly side-on to the Sun. The two days are called equinoxes (equal nights), and they fall in the middle of spring and autumn, usually on September 22 and March 22.
How does spring occur?
According to the astronomical definition, spring occurs when the Sun's rays strike the equator at noon from directly overhead. This particular time varies from year to year due to variations in the Earth's orbit about the Sun.
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