Download Sun, Stars, HR Diagram

Sun, Stars, HR Diagram
1. The most abundant element on the sun is
A) hydrogen
C) carbon
12. In the H-R diagram, 90 percent of all stars fall
B) helium
D) oxygen
2. Most of the radiant energy released by the sun results from the
process of
A) nuclear fission
C) combustion
B) nuclear fusion
D) electrical generation
3. What celestial phenomenum most affects radio communication and
other electrical atmospheric changes for us on earth?
A)
B)
C)
D)
solar eclipses
solar flares
meteorites entering the atmosphere
lunar eclipses
B) 100 times
D) 10,000 times
5. Which star is cooler and less luminous than the Sun?
A) Proxima Centauri
C) Rigel
B) Pollux
D) 40 Eridani B
6. Which two stars are most similar in luminosity?
A)
B)
C)
D)
Betelgeuse and Barnard's Star
Procyon B and Proxima Centauri
Polaris and the Sun
Alpha Centauri and Sirius
7. The star Algol is estimated to have approximately the same
luminosity as the star Aldebaran approximately the same temperature
as the Rigel. Algol is best classified as a
A) main sequence star
C) white dwarf star
B) red giant star
D) red dwarf star
8. Which list shows stars in order of increasing temperature?
A)
B)
C)
D)
Barnard’s Star, Polaris, Sirius, Rigel
Aldebaran, the Sun, Rigel, Procyon B
Rigel, Polaris, Aldebaran, Barnard’s Star
Procyon B, Alpha Centauri, Polaris, Betelgeuse
9. Which star color indicates the hottest star surface temperature?
A) blue
B) white
C) yellow
D) red
10. Compared to other stars, the sun is
A)
B)
C)
D)
among the hottest stars
among the smallest stars
very unique
about average in all respects
11. Compared to the sun a white dwarf star is
A) hotter and larger
C) cooler and larger
B) hotter and smaller
D) cooler and smaller
in the Red Dwarf region.
in the Supergiant region.
among the White Dwarfs.
on the Main Sequence.
13. Which star has the greatest size?
A) Sun
C) Betelgeuse
B) Alpha Centauri
D) Procyon
14. Compared to the sun, Polaris is
A)
B)
C)
D)
4. Approximately how many times larger is the diameter of the sun
compared to the earth?
A) 10 times
C) 1000 times
A)
B)
C)
D)
hotter and less luminous
cooler and more luminous
the same temperature and larger
hotter and larger
15. At which phase of its evolutionary life is a white dwarf star?
A)
B)
C)
D)
the late phase for small mass star
the remains of a larger star's explosion
in the main sequence phase
early phases, soon after a star's formation
16. The probable fate of our sun is
A) to expand as a red giant, undergo a nova outburst and end as a
white dwarf
B) to shrink to a white dwarf then eventually expand to a red
giant
C) become hotter and expand into a blue supergiant
D) to become a black hole
17. By using a spectroscope an astronomer can
A)
B)
C)
D)
measure the size of a star
measure the altitude of a star
identify elements in the atmosphere of a star
measure the diameter of a star
Sun, Stars, HR Diagram
Base your answers to questions 18through 20 on the diagram below, which shows two possible sequences in the life cycle of
stars, beginning with their formation from nebular gas clouds in space.
18.Stars like Earth’s Sun most likely formed directly from a
A) nebula
B) supernova
C) red giant
D) black dwarf
19. According to the diagram, a star like Earth’s Sun will eventually
A) explode in a supernova
C) change into a white dwarf
B) become a black hole
D) become a neutron star
20. According to the diagram, the life-cycle path followed by a star is determined by the star’s initial
A) mass and size
C) luminosity and color
B) temperature and origin
D) luminosity and structure
Answer Key
SunStars
1.
A
2.
B
3.
B
4.
B
5.
A
6.
B
7.
A
8.
A
9.
A
10.
D
11.
B
12.
D
13.
C
14.
C
15.
B
16.
A
17.
C
18.
A
19.
C
20.
A