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Download Name: ____________________________ Date: _____________ Per. _________ Stars Study Guide (Ch. 21)
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Name: ____________________________ Date: _____________ Per. _________ Stars Study Guide (Ch. 21) 1. Branches of Earth Science: Name Description The study of planets, stars, and other objects in space. Lithosphere The waters of the earth Atmosphere 2. What are the tools used to study stars: Tool Used to Study Stars Telescope What tool does helps astronomers determine the composition of stars by creating a spectrum 3. What is a spectrum? __________________________________________________________ 4. What is a constellation? _______________________________________________________ Best Known Constellation Ursa Major (Big Bear) What is part of it Little Dipper 5. 4 Ways to Classify Stars: A. C. B. D. 6. Color & Temperature Place the colors on the line according to their temperature: Hottest Warm A. B. Cool C. Coolest D. Name: ____________________________ Date: _____________ Per. _________ 7. Size Star Size (Smallest to Largest) Neutron How Big size of Earth Medium 10-1000 x’s the sun Super Giant 8. Brightness Type of Brightness Description Apparent Brightness The actual brightness of a star (How much light the star actually gives off) 9. Why does the sun appear to be the brightest star in the sky if it is only medium brightness? 10. What are the 3 factors that affect brightness of a star? A. B. C. 11. Composition (Chemical Make Up) Composition of Stars Percentage of Element 73% Helium 2% 12. Measuring distances to stars How to Measure Unit used ____________: the apparent change in the position of a star in the sky. Light-year: Name: ____________________________ Date: _____________ Per. _________ 13. What is a graph that shows the relationship between absolute brightness and surface temperature of a star? __________________ 14. What is the main sequence?____________________________________________ 15. Why do stars follow two different paths in the Life Cycle of Star? _________________ ___________________________________________________________________ 16. Which type of star lives longer & why? ______________________________________ ___________________________________________________________________ 17. Multi Star Systems Type of System Description A star system with 2 stars Star Cluster # of Stars Hundreds, thousands or millions A huge collection of stars bound together by gravity 18. Our Galaxy Name of our Galaxy Shape of our galaxy 19. It takes the Rigel four hundred million years to move around the center of the Milky Way Galaxy. Express this distance in standard notation 20. Know how to read an H-R diagram 21. Know how to read a graph like the practice graphs we went over