•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?