•The angle of the sun’s
 rays:
 •In the summer it passes
 closer to overhead and therefore shines more directly
  on the summer hemisphere
 •The time the Sun is
 up
 •In the summer it spends
 more than 12 hours above the horizon.
  
 •The seasons are NOT due to the slightly
 elliptical shape of the Earth’s orbit and the fact that it is
 slightly closer to the Sun during part of the year.
 •Test of that
 hypothesis:  If the distance were the
 cause, then when it was summer in the northern hemisphere, what season
 would it be in the southern hemisphere?