The activities are as follows:
Telescopes
This activity has two purposes: an introduction to searching
the Web for specific items and an illustration of how telescopes differ
for different wavelengths. It can be used in a unit on electromagnetic
radiation showing that X-rays, visible light, and radio waves are all the
same kind of radiation with differing wavelengths and energies. The search
of the web and the understanding that telescopes differ according to their
use can be used with young children.
Sunrise
and Sunset
This uses tables from the US Naval Observatory to demonstrate
how the length of the day varies with season and geographic location. It
also demonstrates that the dates of the earliest sunset and the latest
sunrise differ by nearly a month. Finally, there is a fun exercise of finding
the dates of the "blue" moons. This can be done as soon as a student can
understand tables of numbers and plot a simple graph. Ability to subtract
three digit numbers is also required. It can be used in a unit on time,
on geography, or on the shape of the earth's orbit. A final exercise requires
the understanding of proportion but can be done graphically.
Stellar
temperatures
Spectral lines are identified in several stellar spectra,
using a table of elements, wavelengths, and the energy levels of the lower
level from which the radiation is absorbed the spectra are ordered by the
temperature of the star. It is probably usable from grade 7 and up. It
can be used in a unit on atomic structure, chemistry, light, or astronomy.
There is also an exercise that mimics the acquisition of a stellar spectrum.
Nearby
stars
This includes a number of parts ranging from making a
model, that can be done by young students, to exercises that can be used
in trigonometry. The latter can be done other ways. It can be used as a
study of the neighborhood of the sun but also can form the introduction
to a great deal of basic astronomical terms and concepts as well as an
introduction to astronomical distance and time scales.