what causes the changes of seasons?

Answer 1

Uneven heating of the Earth.

Uneven heating of the Earth affects the weather a lot. It causes wind, day and night, cloud cover, seasons, snow cover, pollution, etc. Uneven heating is when the Earth is facing the direction of the sun, and the other part does not get the same heat, so that is why some parts of the world have different seasons. Or, different parts will get different amounts of heat, causing if to be unevenly heated. Since the Earth rotates, it will change the direction it is facing in, making it cooler or warmer, depending on whether or not it is facing the sun.

Answer 2

Cripes, most people don't know, judging by the answers.

The seasons are caused basically because the earth is tilted on its axis 23.5 deg compared with its orbit around the sun. That means that for six months the northern hemisphere is titled more towards the sun than the southen hemisphere, and vice versa for the next six months.

Then, it is a matter of the sun’s intensity and the length of the day (IT HAS NOTHING TO DO WITH ONE HEMISPHERE BEING NEARER THE SUN).

1.In summer, the sun climbs higher in the sky, and thus has less obscuring atmosphere (same reason that the sun is hotter at midday, whatever the season)
2.In summer, the higher sun means its rays are more concentrated (think of a flashlight – shine it straight down and you get a bright circle on the ground; shine it 10 meters in front of you and you get a stretched image, and its not as bright.)
3.The hemisphere tilted towards the sun in summer gets a longer daylight, so the effects in 1 and 2 apply over a longer daylight. If that is hard to visualise, think of the poles. If the northern hemisphere is titled towards the sun, as the Earth rotates on its axis, the north pole is in sun 24 hours a day, while the south pole never sees the sun all day.

Answer 3

The earth spinning on its axis. Certain parts of our world moving toward the Sun and away from the sun at different times of the year causing the weather to change.

Answer 4

I learned recently that the winter cold is helped by the pole spinning and sucking the air out from high up in the atmosphere where it can be -150 degrees and frozen chemicals collect water and this falls to earth as ice and snow.