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Chapter 25 Concept Questions Name:_______________________________Date:___________________ 1. What can astronomers learn by studying a star’s color? ___________________________________________________________________________ ___________________________________________________________________________ 2. How does distance affect parallax? ___________________________________________________________________________ ___________________________________________________________________________ 3. What factors determine a star’s apparent magnitude? ___________________________________________________________________________ ___________________________________________________________________________ 4. The H-R diagram shows the relationship between what two factors? ___________________________________________________________________________ ___________________________________________________________________________ 5. At what point is a star born? ___________________________________________________________________________ ___________________________________________________________________________ 6. What causes a star to die? ___________________________________________________________________________ ___________________________________________________________________________ 7. Describe the life cycle of the sun. ___________________________________________________________________________ ___________________________________________________________________________ 8. How do galaxies differ? ___________________________________________________________________________ ___________________________________________________________________________ 9. What evidence indicates that the universe is expanding? ___________________________________________________________________________ ___________________________________________________________________________ 10. What is the big bang theory? ___________________________________________________________________________ ___________________________________________________________________________ Chapter 25 Concept Questions Name:_______________________________Date:___________________ 1. Absolute magnitude: 2. Apparent magnitude: 3. Big band theory: 4. Binary star: 5. Black hole: 6. Cepheid variable: 7. Constellation: 8. Galaxy cluster: 9. Hubble’s law: 10. Light-year: 11. Main-sequence star: 12. Nebulae: 13. Neutron star: 14. Nova: 15. Protestar: 16. Pulsar: 17. Red giant: 18. Super giant: 19. Supernova: 20. White dwarf: