There are two interesting facts which are not
often noticed, but should be shared
with students to get them interested in this subject.
First, the equinox( falling this year on September 22, 2009) means that the length
of the day is exactly the same all over the earth: from the North Pole
to the South Pole, and from both Temperate Zones, to the Tropics, to the Equator.
Second, which I’ve noticed over many years of watching the world weather, is that TEMPERATURES equal distances north and south
of the equator (in similar continental zones, of course), are roughly the SAME at this time of year.
For example, I live in North Africa. Having travelled many
years ago to Cape Town, South Africa, I’ve continued to watch
the temperatures there, comparing them with the North African temperatures.
Around the time of either the March or September equinoxes, the temperatures
in both North Africa and South Africa are roughly the same!
