How does the rotation of the earth around the axis bring about changes

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Discussion Overview

The discussion centers around how the rotation of the Earth around its axis influences climate changes, particularly in relation to the four seasons, and why equatorial regions do not experience significant seasonal variations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions how Earth's rotation affects climate and the occurrence of seasons, specifically asking about equatorial regions.
  • Another participant suggests that climate variations are due to the Earth's axial tilt and its orbit around the sun, noting that the equator remains relatively unchanged.
  • A different viewpoint emphasizes that while the Earth's tilt is crucial, the distance from the sun does not influence seasonal changes, highlighting the angle of sunlight and daylight duration as key factors.
  • Another participant elaborates on the effects of tilt, explaining that during winter, sunlight strikes the ground at a lower angle, resulting in less heating and shorter daylight hours, particularly further from the equator.
  • It is noted that at the equator, the sun's position changes minimally throughout the year, leading to consistent heating and daylight duration.

Areas of Agreement / Disagreement

Participants express differing views on the role of distance from the sun in seasonal changes, with some asserting it is irrelevant while others do not fully agree. The discussion remains unresolved regarding the extent of each factor's influence.

Contextual Notes

There are unresolved assumptions regarding the relationship between axial tilt, distance from the sun, and their combined effects on climate and seasons. The discussion does not clarify the mathematical or physical principles involved in these claims.

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how does the rotation of the Earth around the axis bring about changes in the climate resulting in the 4 seasons? and why do the countries at the equator not experience seasonel changes?
 
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Climates occur because the Earth is tilted. As it circles the sun the top or bottom becomes closer or further. The equator stays the same.
 
The Earth's tilt to the eciliptic is the cause, but distance has nothing to do with it. (During the Northern Winter, the Earth is actually closer to the Sun due to the shape of its orbit.

What happens is that because of the tilt, during winter, the Sun's light strikes the ground at a lower angle and the same amount of heating is spread over a larger area. Also, It means that a smaller percentage of the Winter hemisphere is in sunlight, which shortens the time of daylight. This effect increases the further you get from the Equator.

At the Equator the sun moves from 23° South fo vertical to 23° North of vertical. So the heating and the length of daylight remain fairly constant over the course of a year.
 
It actually has nothing to do with the distance of each hemisphere from the sun; rather it's the angling and length of day. When your hemisphere is tilted toward the sun, you have a longer daytime and feel the sun's rays more 'head-on.' When you're tilted away, daytime is shorter and you feel the sun's rays more obliquely.

At the equator, days are always 12 hours, and the sun shines from the same angle: it is in the north during northern-hemisphere summer, and in the south during southern-hemisphere summer, but always at the sama angle.
 

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