Name:     ID: 
 
    Email: 

Stars

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
Which of the following is NOT a form of electromagnetic radiation?
a.
radio waves
c.
gamma rays
b.
gravity
d.
visible light
 

 2. 
Which color has the longest wavelength?
a.
red
c.
green
b.
blue
d.
orange
 

 3. 
Gamma rays, X-rays, visible light, and radio waves are all types of ____.
a.
nuclear energy
c.
ultraviolet radiation
b.
chromatic aberration
d.
electromagnetic radiation
 

 4. 
Which color has the most energetic photons?
a.
red
c.
blue
b.
orange
d.
violet
 

 5. 
What information does a star’s spectrum offer about the star?
a.
size
c.
age
b.
chemical composition
d.
none of the above
 

 6. 
Which of the following refers to the change in wavelength that occurs when an object moves toward or away from a source?
a.
Doppler effect
c.
spectroscopy
b.
chromatic aberration
d.
wave theory of light
 

 7. 
What will happen to an object’s wavelength as the object moves toward you?
a.
The wavelength will be shortened.
c.
The wavelength will not change.
b.
The wavelength will be lengthened.
d.
The wavelength will vary.
 

 8. 
Large Doppler shifts indicate ____.
a.
low speeds
c.
low temperatures
b.
high speeds
d.
high temperatures
 

 9. 
Using the Doppler effect, astronomers can determine a star’s ____.
a.
temperature
c.
movement toward or away from Earth
b.
chemical composition
d.
age
 

 10. 
Which famous scientist first used a telescope for astronomical observations?
a.
Albert Einstein
c.
Galileo
b.
Isaac Newton
d.
George Hale
 

 11. 
What advantage do space telescopes have over telescopes used on Earth?
a.
They are much cheaper to build.
b.
They are not affected by Earth’s atmosphere.
c.
They do not need lenses or mirrors to gather light.
d.
They last longer.
 

 12. 
The outermost layer of the sun is called the ____.
a.
ionosphere
c.
corona
b.
photosphere
d.
chromosphere
 

 13. 
Which part of the sun lies directly above the visible “surface” of the sun?
a.
photosphere
c.
corona
b.
chromosphere
d.
ionosphere
 

 14. 
The sun’s surface has a grainy texture produced by numerous bright markings called ____.
a.
granules
c.
sunspots
b.
umbras
d.
solar flares
 

 15. 
The sun’s surface is made up mostly of ____.
a.
helium
c.
hydrogen
b.
ammonia
d.
oxygen
 

 16. 
Streams of electrons and protons that shoot out from the sun’s corona make up the solar ____.
a.
atmosphere
c.
rays
b.
wind
d.
granules
 

 17. 
What are the most explosive events that occur on the sun?
a.
umbras
c.
solar flares
b.
prominences
d.
solar winds
 
 
stars_study_test_files/i0190000.jpg
 

 18. 
Using Figure 24-1, what solar features are labeled C?
a.
prominences
c.
solar flares
b.
solar winds
d.
sunspots
 

 19. 
Sunspots appear dark because they are ____.
a.
relatively cool
c.
deep holes
b.
relatively hot
d.
solid areas
 

 20. 
The product of nuclear fusion is ____.
a.
hydrogen
c.
helium
b.
oxygen
d.
nitrogen
 

 21. 
The source of the sun’s energy is ____.
a.
chemical burning
c.
nuclear fusion
b.
nuclear fission
d.
photosynthesis
 

 22. 
The sun can continue to exist in its present stable state for about another ____.
a.
5.5 billion years
c.
15.5 billion years
b.
10 billion years
d.
100 billion years
 

 23. 
Stars of which color have the highest surface temperature?
a.
red
c.
yellow
b.
orange
d.
blue
 

 24. 
Stars of which color have the coolest surface temperature?
a.
red
c.
yellow
b.
orange
d.
blue
 

 25. 
Stellar distances are usually expressed in what units?
a.
miles
c.
light-years
b.
kilometers
d.
none of the above
 

 26. 
The measure of a star’s brightness is called its ____.
a.
magnitude
c.
intensity
b.
parallax
d.
color index
 

 27. 
Which of the following does NOT affect the apparent brightness of a star?
a.
how old the star is
c.
how hot the star is
b.
how big the star is
d.
how far away the star is
 

 28. 
The difference in the brightness of two stars with the same surface temperature is attributable to their ____.
a.
densities
c.
ages
b.
colors
d.
sizes
 

 29. 
A Hertzsprung-Russell (H-R) diagram shows the relationship between ____.
a.
absolute magnitude and apparent magnitude
b.
temperature and absolute magnitude
c.
parallax and temperature
d.
apparent magnitude and parallax
 

 30. 
About 90 percent of stars on the H-R diagram are ____.
a.
supergiants
c.
white dwarfs
b.
main-sequence stars
d.
black holes
 

 31. 
Which main-sequence stars are the most massive?
a.
red
c.
yellow
b.
orange
d.
blue
 

 32. 
Which main-sequence stars are the least massive?
a.
red
c.
yellow
b.
orange
d.
blue
 
 
stars_study_test_files/i0350000.jpg
 

 33. 
According to Figure 25-1, which main-sequence stars are brightest?
a.
the smallest
c.
the hottest
b.
the coolest
d.
none of the above
 

 34. 
According to Figure 25-1, the sun has an absolute magnitude of ____.
a.
–5
c.
5
b.
0
d.
5000
 

 35. 
Another name for the interstellar matter that will eventually form a star is ____.
a.
supernova
c.
black hole
b.
red giant
d.
nebula
 

 36. 
A star is said to be born when ____.
a.
a protostar reaches a temperature high enough for nuclear fusion to begin
b.
a red giant collapses on itself and becomes a black hole
c.
pressure within a protostar becomes so great that a supernova occurs
d.
a dark, cool interstellar cloud begins to contract
 

 37. 
Which force is most responsible for the formation of a star?
a.
gravity
c.
interstellar force
b.
nuclear force
d.
electromagnetic force
 

 38. 
Massive stars terminate in a brilliant explosion called a ____.
a.
red giant
c.
neutron star
b.
protostar
d.
supernova
 

 39. 
All stars, regardless of size, eventually ____.
a.
turn into black dwarfs
c.
run out of fuel and collapse
b.
explode
d.
become black holes
 

 40. 
When a main-sequence star has exhausted the fuel in its core, it becomes a ____.
a.
black hole
c.
neutron star
b.
black dwarf
d.
red giant
 

 41. 
The sun is a ____.
a.
black hole
c.
main-sequence star
b.
black dwarf
d.
red giant
 

 42. 
What is the next stage in the sun’s life cycle?
a.
white dwarf
c.
planetary nebula
b.
red giant
d.
black dwarf
 

 43. 
Light cannot escape the intense gravitational pull of a ____.
a.
black hole
c.
main-sequence star
b.
black dwarf
d.
red giant
 

 44. 
Our galaxy is called the ____.
a.
Local Group
c.
Andromeda
b.
Orion
d.
Milky Way
 

 45. 
Which of the following indicates that the universe is expanding?
a.
red shift of distant galaxies
b.
red shift of the galaxies in the Local Group
c.
blue shift of distant galaxies
d.
blue shift of the Milky Way
 

 46. 
Based on the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that ____.
a.
Earth is in the center of the universe
b.
the universe is contracting
c.
the universe is expanding
d.
the universe is smaller than once believed
 

 47. 
Greater red shifts in the spectra of galaxies indicate ____.
a.
faster speeds
c.
higher temperatures
b.
slower speeds
d.
lower temperatures
 

 48. 
According to the big bang theory, the universe began about ____.
a.
4.5 billion years ago
c.
49.6 billion years ago
b.
13.7 billion years ago
d.
130 billion years ago
 

 49. 
Which of the following supports the big bang theory?
a.
pulsars
c.
galactic clusters
b.
cosmic background radiation
d.
irregular galaxies
 



 
Submit          Reset Help