1.Which of the following stellar spectral classes would most likely experience a supernova event?
a. O
b. K
c. G
d. M
2.What happens to the magnitude of an older star as its luminosity increases?
a. magnitude increases
b. magnitude is unaffected
c. magnitude decreases
d. magnitude fluctuates
3.Which of the following cannot occur to a one solar mass star similar to the Sun?
a. formation of a cooling black dwarf
b. development of a black hole
c. formation of a red giant
d. a correct answer does not appear for this question
4.Which of the following is most similar in composition to Jupiter?
a. white dwarf
b. brown star
c. planetary nebula
d. black dwarf
5.White dwarfs resulting from 1 solar mass stars are primarily composed of
a. carbon
b. helium
c. silicon
d. iron
6. The magnitude of a star _____ during a supernova event.
a. increases
b. decreases
c. is unaffected
d. fluctuates constantly
7. The fusion of hydrogen can only occur in the Sun’s
a. convective zone
b. radiative zone
c. corona
d. core
8. What is the minimum mass for a main sequence star?
a. 0.01 M
b. 0.08 M
c. 0.50 M
d. 0.70 M
9. The Sun cannot be destroyed by a supernova because
a. the total mass is insufficient
b. the solar interior is too hot
c. the volume exceeds 100 solar masses
d. G class stars are not part of a binary system
10. Which of the following spectral class stars would have the longest lifespan?
a. O
b. K
c. M
d. G
11.Which of the following would not occur during the proton-proton chain sequence?
a. formation of helium
b. formation of deuterium
c. absorption of multiple neutrinos by the hydrogen atom?s nuclei
d. gamma ray production
12. The northern and southern lights result from
a. charged particles from the solar wind striking the upper atmosphere
b. the increased production of helium in the solar core
c. the inability of low energy photons to escape the solar corona
d. the expansion of the Earth’s thermosphere
13. The Sun is a G-2 type star with a absolute magnitude of +4.8. If another star had a magnitude of + 5.8, it would be
a. approximately 2.5 x dimmer
b. 100 X brighter
c. 500 X greater in luminosity
d. at least 10X larger in diameter
14. When the one solar mass star eventually reaches the Red Giant stage, the core will be primarily composed of
a. hydrogen
b. helium
c. carbon
d. iron
15. Which of the following would not be part of a black hole concept?
a. X-rays
b. accretion disk
c. form from stars similar in mass to the Sun
d. extreme gravitational forces
16. If a star-like object composed of hydrogen has less than 0.08 M, it is referred to as a
a. brown dwarf or planet
b. black hole
c. main sequence star
d. a correct answer does not appear for this question
17. The ring of gas that drifts away from a white dwarf is referred to as a
a. accretion sheet
b. neutron shell
c. black cloud
d. planetary nebula
18. Which of the following represents the element formed in the core during the Sun’s earliest stages as a main sequence star?
a. magnesium
b. helium
c. hydrogen
d. iron
19. The surface temperature portion of the H-R diagram indicates the temperature of the star’s
a. photosphere
b. chromosphere
c. prominence
d. corona
20. The total lifespan of the Sun on the main sequence approximates _____ years.
a. 1 billion
b. 5 billion
c. 10 billion
d. 100 billion
21. The outermost boundary of a black hole is referred to as the
a. event horizon
b. singularity
c. kryosphere
d. mass transfer terminus
22. Which of the following has a size similar to that of the Earth?
a. pulsar
b. neutron star
c. white dwarf
d. black hole
23. At accretion disks
a. only long wavelength radiation is produced
b. the generation of heat is not possible
c. rotation of the disk cannot occur
d. a correct answer does not appear for this question
24. The central region of a black hole is known as the
a. ergosphere
b. spacetime point
c. singularity
d. warp region
25.Which of the following stars is not considered main sequence?
a. Betelguese
b. Tau Ceti
c. Sirius
d. a correct answer does not appear for this question
26. The assigned spectral class of a star with 25 solar masses is
a. F
b. O
c. K
d. A
27. Which of the following spectral classes would spend the longest time on the main sequence?
a. F
b. O
c. K
d. A
28. In which of the following constellations is a black hole thought to exist?
a. Orion
b. Cygnus
c. Leo
d. Canis Major
29. The generally accepted maximum mass of a red dwarf is _____ masses.
a. 0.008
b. 0.18
c. 0.4
d. 0.8
30. The Sun is considered to be a _____ star.
a. metal rich
b. metal poor
c. Population II
d. cepheid variable

True or False.

31. Neutron stars are believed to have weak magnetic fields.
T
F
32. The smaller the mass that a black hole has, the larger the event horizon will be.
T
F
33. If the mass that forms the black hole is not rotating, the forming black hole will not rotate either.
T
F
34. The matter inside a black hole has zero mass.
T
F
35. Red giant stars only produce energy from gravitational contraction.
T
F
36. The core of a one solar mass red giant is primarily composed of hydrogen.
T
F
37. Helium flash occurs during the formation of a star’s planetary nebula.
T
F
38. The luminosity of a red giant is less than that of a white dwarf.
T
F
39. Black dwarfs are primarily composed of iron.
T
F
40. Convection cannot occur in a star unless it has a mass greater than 0.75 that of the Sun.
T
F
41. Population III stars are the most common type of stars found on the main sequence.
T
F
42. Approximately 70 % of the stars in a spiral galaxy are considered to be metal poor.
T
F
43. Although the Milky Way galaxy rotates once every 250 million years, the Sun remains in a fixed position and does not revolve around the center of the galaxy.
T
F
44. The Sun?s position in the Milky Way is closer to the edge than the center.
T
F
45. A distance of one light year approximates 5.9 billion miles.
T
F
46. The Large and Small Magellanic Clouds are globular clusters.
T
F
47. The Local Group contains approximately 12 galaxies.
T
F
48. The most common form of galaxy found in the Local group has an irregular shape.
T
F
49. A 100 solar mass neutron star is thought to exist at the center of the Milky Way.
T
F
50. The star Vega is classifies as a red giant.
T
F
51. The mass of Saturn categorizes it as a brown dwarf.
T
F
52. Globular clusters are mostly composed of young stars.
T
F
53. Neutron stars cannot rotate faster than 12 X per second.
T
F
54. The ?lighthouse? model is associated with white dwarfs.
T
F
55. When a star supernovas, its luminosity decreases.
T
F
56. When a star becomes a red giant, its absolute magnitude decreases.
T
F
57. When a star becomes a black hole, its absolute magnitude increases.
T
F
58. Black holes can only form from collapsed stars.