•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?