THE GLOBAL WARMING TEST

Question 8:

Which answer below provides the best explanation for the following temperature record?

Industrial pollution from factories, power plants, and cars caused global warming
Natural variations in global temperatures may occur in roughly 500-years cycles
Global cooling occurred as a result of the Renaissance Period

Sorry...that is incorrect.

Hey! You're just being silly now, aren't you.

For your information, variations in global temperature are caused primarily by solar activity cycles and periodic effects of Earth's orbit about the sun. In addition to 40-year cycles and 500-year cycles, other temperature cycles include:

  • 21,000 year cycle: Elliptical orbit of the Earth around the Sun (precession of the equinoxes)
  • 41,000 year cycle: Cycle of the +/- 1.5 degree wobble in Earth's orbit
  • 100,000 year cycle: Variations in the shape of Earth's elliptical orbit ( cycle of eccentricity )

Question 9


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