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Seasons

Which earth motion is responsible for the change in seasons?

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January 31, 2013 4:59AM

the 23.5 degree tilt of the earth's axis.

in north hemisphere summer, the sun is not above the equator, but 23.5 degrees above it on the tropic of cancer.

this makes north warmer and south colder

in winter, the sun is below the equator- 23.5 degrees again, at the tropic of capricorn, so it is colder in the north, hence the fact that Australians celebrate Christmas at the same time as us, but it is in their mid summer