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Name _______________________________ Period _______ Astronomy Unit Study Guide 1. _____ geocentric 2. _____ J. Kepler 3. _____ heliocentric 4. _____ constellation 5. _____ the Sun 6. _____ E. Hubble 7. _____ hydrogen 8. _____ C. Ptolemy 9. _____ N. Copernicus 10._____ nebula A. the most abundant element (atom) in the universe B. the “star” in the middle of our solar system C. he formed three law’s of planetary motion D. a cloud of dust and gas in space E. the idea that the sun is the center of the solar system F. he developed a model of a sun-centered solar system G. a pattern of stars in the sky H. Greek astronomer who developed a geocentric model of planetary motion I. the idea that the earth is the center of the universe J. he developed a law that other galaxies are moving away from us 11. Place the following cosmic objects in order from smallest to largest: galaxy, star, planet, constellation, moon, universe, asteroid, solar system 12. Draw a simple wave & label the following parts: wavelength, trough, height, crest (or peak) 13. Make a simple sketch of the electromagnetic spectrum & label the following parts: radio waves, gamma rays, visible light (ROYGBV), high energy, low energy, long waves, short waves 14. Define: Hubble’s Law Red shift Blue shift Big Bang Theory - (not the TV show) 15. Briefly describe the steps of how our solar system formed according to the nebular hypothesis. (Use the following terms in your description: gravity, accretion, nebula.) 16. What is the reason for Earth’s seasons? How long does it take the Earth to orbit the sun once? 17. Define: Equinox Solstice - 17. List & explain Kepler’s 3 Laws of Planetary Motion. 18. Define: Ellipse Barycenter Precession Nutation Revolution Rotation - 19. In what part of the Milky Way Galaxy is our solar system located? 20. The word “nuclear” means having to do with the nucleus of an atom. What is the basic difference between nuclear fusion and nuclear fission? 21. Which one of these reactions (nuclear fusion or nuclear fission) takes place in the middle of a star? (Honors only) 22. An astronomical unit (AU) is the distance from the sun to the earth. One AU equals 149,000,000,000 meters. Write this number using scientific notation.