UCCS PES 1060 Astronomy II Spring/Fall Chapter 16: The Sun Please copy the questions and handwrite your answers on a separate sheet of paper. Use one side only, and staple the pages. Thanks 1. List the main regions of the Sun. 2. Describe the main regions from q. 1 3. How hot is the solar surface? 4. How hot is the solar core? 5. What is luminosity? 6. How is luminosity measured in the Sun? 7. What is helioseismology? 8. Why does the Sun appear to have a sharp edge? 9. What is solar wind? 10. Why is the solar cycle 22 year long? 11. What is the cause of sunspots? 12. What is the cause of flares? 13. What is the cause of prominences? 14. What fuels the the Sun’s energy output? 15. What are the main components of the “proton-proton” chain in the Sun? 16. Why is energy released in the “proton-proton” chain? 17. Is our Sun a star or a Sun only…?