Why do we have seasons?

Question

This is a serious question. I don't want to see anything like, "Because we do." or "Because they change from fall to winter" etc. This is an EXPLICIT QUESTION THAT I NEED TO KNOW.

Answer 1

.The seasons result from the Earth's axis being tilted to its orbital plane; it deviates by an angle of approximately 23.5 degrees of arc.

Answer 2

As the Earth moves around the Sun, this axis stays always pointing in the same direction. This means that, during part of the year, the northern part of the Earth will lean more directly against the sun, and during other parts the southern part will. If you were wondering why it has to do with temperature Well, when the northern hemisphere is leaning away from the sun, the rays coming from it hit this part of the Earth at a smaller angle than on other parts of the world. This means that the same amount of light is distributed over a larger surface, and therefore these places receive less heat than the others. The southern hemisphere is experiencing Summer, the northern hemisphere Winter. In half a year, the situation reverses, and it is now Winter in the southern hemisphere since that part of the earth is now leaning away from the sun.

The seasons are then the result of this tilt of the Earth's axis. If the tilt of the Earth's axis was 0° there would be no difference in how the rays from the sun hit its different regions, and there would be no seasons.

Not all planets have the same kind of tilt as the Earth has: Uranus, for example, has a tilt of almost 98°. Its axis, then, lies almost on the plane of its orbit, and a day there lasts about as much as one year on Uranus: about 84 Earth-years.

(But yea you learn this stuff in school)

Answer 3

As the earth revolves around the sun, it stays at a pretty consistent distance from it as a whole, but its axis (an imaginary line from the North Pole to the South Pole) is tilted. This means that during some parts of the year any given point on earth is closer to the sun than during others. This effect is more dramatic the closer one gets to the poles, because their distance from the sun changes the most.

Answer 4

They are a result of the axis tilt of the Earth along with the rotation around the Sun. Reasons for Seasons. Strange as it may sound, the Earth is actually colsest to the Sun during Winter.

Answer 5

Causes and climatic effects
The seasons result from the Earth's axis being tilted to its orbital plane; it deviates by an angle of approximately 23.5 degrees of arc. Thus, at any given time during the summer or winter, one part of the planet is more directly exposed to the rays of the Sun (see Fig. 1). This exposure alternates as the Earth revolves in its orbit. At any given time, regardless of season, the northern and southern hemispheres experience opposite seasons (see Fig. 2 and Month ranges of seasons (below) and Effect of sun angle on climate).

Seasonal weather fluctuations also depend on factors such as proximity to oceans or other large bodies of water, currents in those oceans, El Niño/ENSO and other oceanic cycles, and prevailing winds.

In the temperate and polar regions, seasons are marked by changes in the amount of sunlight, which in turn often cause cycles of dormancy in plants and hibernation in animals. These effects vary with latitude, and with proximity to bodies of water. For example, the South Pole is in the middle of the continent of Antarctica, and therefore a considerable distance from the moderating influence of the southern oceans. The North Pole is in the Arctic Ocean, and thus its temperature extremes are buffered by the presence of all that water. The result is that the South Pole is consistently colder during the southern winter than the North Pole during the northern winter.

The cycle of seasons in the polar and temperate zones of one hemisphere is opposite to that in the other. When it is summer in the Northern hemisphere, it is winter in the Southern hemisphere, and vice versa, and when it is spring in the Northern hemisphere it is autumn in the Southern hemisphere, and vice versa.

In the tropics, there is no noticeable change in the amount of sunlight. However, many regions (famously the northern Indian Ocean) are subject to monsoon rain and wind cycles. Curiously, a study of temperature records over the past 300 years (David Thompson, Science, April 1995) shows that the climatic seasons, and thus the seasonal year, are governed by the anomalistic year rather than the tropical year.

In meteorological terms, the winter solstice and summer solstice (or the date maximum/minimum insolation) do not fall in the middle of winter and summer respectively. The heights of these seasons occur up to a month later due to seasonal lag. Seasons though, are not always defined in meteorological terms; see reckoning

Compared to axial tilt, other factors contribute little to seasonal temperature changes. It's a common misconception that the seasons are the result of the variation in Earth’s distance to the sun due to its elliptical orbit.[1] Orbital eccentricity can influence temperatures, but on Earth, this effect is small and is more than counteracted by other factors; research shows that the Earth as a whole is actually a few degrees warmer when farther from the sun.[2] Mars however experiences wide temperature variations and violent dust storms every year at perihelion.[3]

You could get more information from the link below...

Answer 6

It has to do with the tilt of the earth. In the Northern Hemisphere, winter occurs when the south pole tilts toward the sun and the north pole tilts away from the sun. Summer occurs when the opposite happens, the north pole tilts toward the sun and the south pole away from it.

Answer 7

because the earth rotates (day and night) *and* tilts on its axis.

So, if you were to shine a flash light on a globe and spin it, that's like the sun and that's what day and night is.

But, if instead of spinning it, you were able to tilt it down and up, that's what causes seasons. Closer and Further distance to the sun. That's why places on the equater don't really have seasons, because being near the middle of the earth (so to speak) they are always relatively the same distance from the sun.

Answer 8

Because the earth tilts towards and away from the sun, the length of days, the amount of sunlight, the further away from the equator you are the more extreme the seasons become, the closer to the equator you are, the less you notice them.

Answer 9

We have seasons, because the earth axis has been tilted about 23 degrees.

Th

Answer 10

we have seasons b/c the earth moves in circle and we move away from the sun and it goes on for millions of years and the most you are away from the sun the most cold it is it is called winter them most close to the sun we are is called summer