Star Life Cycle Review

1. Star Life Cycle Review

2. Transports energy from the radiative zone to the surface of the sun. • Sunspot • Corona • Photosphere • Convective zone

3. Convective zone

4. The only layer of the sun that reflects visible light. • Sunspot • Corona • Photosphere • Solar flare

5. photosphere

6. Outermost layer of the sun that is hotter than the surface of the sun and seen only during a solar eclipse. • Sunspot • Corona • Solar flare • Convective zone

7. Corona

8. Cooler areas located near the equator on the surface of the sun • Sunspot • Photosphere • Chromosphere • Solar flare

9. sunspot

10. Violent explosions of gas released from the chromsphere and corona. • Sunspot • Photosphere • Chromosphere • Solar flare

11. Solar flare

12. The spherical distance surrounding a black hole out of which nothing can escape • Accretion disk • Singularity • Event horizon • Escape velocity

13. Event horizon

14. A spiral of gas that can surround a black hole. • Accretion disk • Singularity • Event horizon • Escape velocity

15. Accretion disk

16. The speed at which an object must travel to escape the gravitational pull of anther object. • Accretion disk • Singularity • Event horizon • Escape velocity

17. Escape velocity

18. The point at the center of a black hole • Accretion disk • Singularity • Event horizon • Escape velocity

19. singularity

20. ____________ are caused by solar winds interacting with the Earth’s magnetosphere at the poles. • Auroras • Northern lights • Southern lights • All of the above • None of the above

21. All of the above

22. The sun generates huge amount of energy through nuclear ________. • Fission • Fusion

23. fusion

24. In the sun’s core __________ collide with other ___________ to produce helium atoms. • Protons • Electrons • Neutrons

25. protons

26. Suppose a star that is 500 light years away from Earth exploded 500 years ago. When will see the explosion? • 500 years ago • 500 years from now • today

27. today

28. Of the following stars, the youngest are • Main sequence stars • White dwarfs • Black dwarfs • Red giants

29. Main sequence stars

30. White dwarfs stars • Form from red giants • Fuse hydrogen to carbon • Form from planetary nebulas • Form supernovas

31. Form from planetary nebulas

32. Nearly 90% of all stars are in what point of their life cycle? • Nebulas • Protostars • Main sequence stars • White dwarfs

33. Main sequence stars

34. The sun is • An unusually hot star • A very cool star • A typical star • None of the above

35. A typical star

36. The surface temperature of a star can be estimated based on the star’s • Size • Color • Age • Mass

37. color

38. All stars • Reflect light from the sun • Appear to wander off their star paths • Produce their own light • All of the above • None of the above

39. Produce their own light

40. The solar wind pushes and shapes the Earth’s ____________. • Magnetic Poles • Magnetosphere • Atmosphere • Weather patterns

41. Magnetosphere

42. The corona is hotter than the ___________ of the sun. • Core • Radiative zone • Convective zone • Photosphere (surface)

43. Photosphere (surface)

44. The sun is a medium sized star but looks very bright to us because it is • Very luminous • Very hot • Father away from us than other stars. • Closest to us

45. Closest to us

46. A red star is hotter than • a blue star • A white star • All other stars • No other stars

47. No other stars

48. Most of the stars in the Milky Way will end their lives as • Blackholes • Neutron stars • Black dwarfs • Main sequence stars

49. Black dwarfs

50. A star is born when • Gas and dust collapse inward • Nuclear fusion starts in the core • Fusion of the hydrogen slows down • The core becomes carbon and oxygen