Name: 
 

Chapter 07 & 08 Quiz



True/False
Indicate whether the statement is true or false. (1-Point Each)
 

 1. 

Most of the visible light from the sun originates in the photosphere.
 

 2. 

The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth.
 

 3. 

To observe a spectroscopic binary, we must be able to see both stars individually.
 

 4. 

The Babcock model employs differential rotation of the solar surface and a magnetic dynamo to describe the formation of sunspots.
 

 5. 

The location of a star in the HR diagram indicates its temperature and intrinsic brightness.
 

 6. 

The chromosphere of the sun has a higher temperature than the photosphere.
 

 7. 

Granulation is caused by rising currents of hot gas below the photosphere.
 

 8. 

Sunspots are hotter than the photosphere.
 

 9. 

We can find the masses and diameters of stars that are in eclipsing binary systems.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question. (3-Points Each)
 

 10. 

Sunspots
a.
are cooler than their surroundings.
b.
are regions where material is rising from below the photosphere.
c.
are the result of convection.
d.
produce spicules.
e.
are generally found near the poles of the sun during sunspot maximum.
 

 11. 

Parallax would be easier to measure if
a.
Earth's orbit were larger.
b.
the stars were farther away.
c.
Earth moved faster along its orbit.
d.
all of these
e.
none of these
 

 12. 

____________ is (are) produced by atomic transitions in the presence of a strong magnetic field.
a.
Differential rotation
b.
Granules
c.
The Zeeman effect
d.
Spicules
e.
The coronal hole
 

 13. 

Differential rotation of the sun (best answer)
a.
causes the heating in the chromosphere and corona that makes them hotter than the photosphere.
b.
is caused by the magnetic dynamo inside the sun.
c.
implies that the equatorial regions of the sun rotates faster than the polar regions.
d.
causes the sunspots to migrate slowly from the equator toward the poles as the sun rotates.
e.
implies that the sun's southern hemisphere and northern hemisphere rotate in opposite directions.
 

 14. 

Granulation is caused by
a.
sunspots.
b.
rising gas below the photosphere.
c.
shock waves in the corona.
d.
the solar wind flowing away from the corona.
e.
the heating in the chromosphere.
 

 15. 

The chromosphere of the sun
a.
is hotter than the photosphere.
b.
appears yellow-white in color during total solar eclipse.
c.
is the visible surface of the sun.
d.
produces an absorption spectrum.
e.
all of the above.
 

 16. 

The most common stars are
a.
supergiants.
b.
giants.
c.
upper main sequence stars.
d.
white dwarfs.
e.
lower main sequence stars.
 

 17. 

The centers of granules
a.
are hot material rising to the photosphere from below.
b.
are cool material falling from the photosphere to the regions below.
c.
are fainter and hotter than their surroundings.
d.
are brighter and cooler than their surroundings.
e.
show strong Zeeman effects.
 

 18. 

We know that giant stars are larger in diameter than the sun because
a.
they are more luminous but have about the same temperature.
b.
they are less luminous but have about the same temperature.
c.
they are hotter but have about the same luminosity.
d.
they are cooler but have about the same luminosity.
e.
they have a larger absolute magnitude than the sun.
 

 19. 

Sunspots are known to be magnetic phenomena because
a.
Doppler shifts in spectral lines are observed.
b.
the Zeeman effect is observed in sunspots.
c.
collisional broadening is observed in spectral lines.
d.
infrared observations indicate that the sunspots are cooler than their surroundings.
e.
observations during eclipses reveal a very extensive photosphere.
 

 20. 

A recent sunspot maximum occurred in 2001, what is the year of the sunspot maximum that immediately follows the 2012 maximum if the solar cycle continues?
a.
2018 or 2019
b.
2023
c.
2029
d.
2034
e.
the last cycle started a Maunder minimum and the next maximum can not be predicted.
 

Fill In the Blank
Complete each of the folloiwng statements. (5-Points Each)
 

 21. 

Complete the following diagram clearly showing the following:

      The star groupings.
      The percentage of stars on each of these groupings.
      The name of each of these groupings.

co021-1.jpg
 

 

 22. 

Name the layers of our sun starting with the first visible layer and work outward.

      a.___________________________________________


      b.___________________________________________


      c.___________________________________________
 

 

Short Answer
Provide a short answer for the following question. (5-Points or More Each)
 

 23. 

Why would parallaxes be easier to observe if Earth were farther from the sun?
 

 24. 

How can we find the distance to a star that is too distant to have a measurable parallax?
 

 25. 

What are the current methods used to determine distance?
 

 26. 

What evidence do we have that the sunspots are magnetic?
 



 
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