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* Build a working sun dial.
* Build a telescope.
* Build a model of the Solar System.
* Build a model of a NASA space probe.
* Discuss the effects of an impact by a meteor, comet, or asteroid.
* Measure the distance and/or diameter of the sun and/or moon.
* Explain comets.
* Measure the circumference of Earth.
* Discuss global warming.
* Choose one of the planets to create a project around: Mercury, Venus, Earth, (Moon), Mars, Jupiter, Saturn, Uranus, Neptune, or the Dwarf Planet Pluto.
* How can we tell the Earth is turning?
* How can we tell the Earth orbits the sun?
* Explain the magnetic field of Earth.
* Demonstrate creating electricity from Solar Power.
* Demonstrate other uses for Solar Power; solar stoves, etc.
* Discuss why stars twinkle.
* Demonstrate gravity; discuss what different objects would weigh on other planets.
* Explain why the moon shines; discuss eclipses.