Across
- 6. the sun is categorized as this type of star
- 11. Supernovae are the only natural way that elements heavier than ______ are created
- 13. type 2 supernovae require _________ star(s)
- 14. this is the order of the letters for stellar classifications
- 15. in order to fuse hydrogen into helium, the core of a star needs to reach 15 _______ Kelvin
- 16. this type of star changes in brightness
- 18. this area of the H-R Diagram is where most stars fall.
- 21. after hydrogen, the most common element in stars is
- 22. given a fixed volume, if pressure increases then ___________ increases
- 23. a star will fuse helium much _____________ than hydrogen
- 24. fusing helium produces more ____________ than fusing hydrogen
- 25. A blue star is typically ___________ than a red star
- 28. this section of the Hertzsprung-Russell Diagram is below the main sequence
- 32. The energy of fusing in the core of stars is the only thing preventing a star from dying due to its own ______________
- 33. The Sun’s stellar classification is _______
- 34. type 2 supernovae that create black holes must start with a mass of _________________ times more than the Sun
- 35. stars with more mass live much _________ lives than low mass stars
Down
- 1. over half of the stars in the night sky are in a ___________ system (they have a companion)
- 2. K type stars are typically what color?
- 3. this is the stage of a low mass star after the red giant phase
- 4. there are _________ high mass stars than there are low mass stars
- 5. fusing iron (or in some cases, carbon) causes this to happen
- 7. this type of supernova is the result of one star accreting mass from a companion
- 8. Given a fixed temperature, if pressure increases then _______________ decreases
- 9. a magnitude 2.5 star is ____________ than a magnitude 3.5 star
- 10. Compared to other stars, the Sun is relatively _________ in size
- 12. The Sun will ends its life cycle as a white dwarf with carbon and _________ as the only remaining elements
- 17. Betelgeuse is this type of star (color and size)
- 19. the force that keeps white dwarfs from collapsing is called electron ___________ pressure which occurs because electrons don’t like being near each other
- 20. O type stars are typically what color?
- 26. type 1a supernovae require _________ star(s)
- 27. there are about 200 ________ stars in the Milky Way
- 29. In a massive star, it takes a single _____ to fuse all silicon into iron
- 30. this is the name of the stage of a star before it starts fusing hydrogen
- 31. Hot stars are typically brighter or more ____________ than cooler stars