Then he asked, "What
about the orbit of a Geosynchronous Satellite?" Answer: about 22,000
miles above the surface of the Earth! Again using the Earth model he explains that the Earth's
diameter at the Equator is roughly 7,926 miles. Our model here is
about 1 ft in diameter. So let's say 1 ft. = 7,926 miles. That's the
"**scale**" we'll use.
With that we can say
that the Satellite is about 2.8 ft away from the surface of this model. None of
us had any idea as to the scale of these distances until this simple
demonstration made it perfectly clear. And on it went. How far to
the Moon? The Sun?
Joe went on to explain
that the demo works so well, that he has started using multiple
inflatable earths, set in a line to make it fun for the students as
they become involved. This demonstration engages students and
creates a lasting impression that won't be forgotten. Joe has
provided his spreadsheet of distance data and scale conversions in a
free download for your use. |