What causes seasons?

The Reasons For Seasons Leslie

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The Reasons For Seasons Leslie
by Leslie Simon - Tuesday, 23 October 2012, 1:10 PM

1: We have seasons because of the tilt of the Earth.

2: Along with number one, the tilt stays the same, but we rotate around the sun.

3: When the Northern hemisphere is tilted toward the sun, they experience summer,

while the Southern hemisphere is experiencing winter, and same when it is switched.