Astronomy 120 - Stars and Galaxies » Fall 2022 » Unit 5 Quiz

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Question #1
Sunspots are cooler, less intense (visibly darker) areas of the
A.   corona
B.   core
C.   chromosphere
D.   photosphere
Question #2
Sunspots are now known to be associated with strong magnetic fields. This has been determined by
A.   using a compass.
B.   sending a probe to the Sun to measure the magnetic field directly.
C.   noticing the fraunhofer lines from light from sunspots were split into a number of lines, with close λ values.
D.   noticing the temperature of the sunspots was different than surrounding areas.
Question #3
The "butterfly diagram" maps the percentage of visible sunspots on the Sun's surface by putting the Sun's on the diagram's y-axis and the (in years) on the x-axis.
A.   magnetic field; time
B.   equator; occurrences
C.   latitudes; time
D.   longitudes; period
Question #4
The variable m in E = mc2 represents .
A.   the amount of mass produced in the fusion process.
B.   the amount of mass lost in the fusion process.
C.   the amount of mass necessary for the fusion process.
D.   the amount of total mass of all atoms in the fusion process.
Question #5
The type of stellar energy production in the Sun's core is called the proton-proton chain. This involves
A.   the fission of uranium.
B.   the chain reaction that produces four protons.
C.   the fusion of hydrogen into helium.
D.   the fission of hydrogen.
Question #6
The proton-proton chain reaction requires how many atoms of hydrogen to produce one atom of helium?
A.   2
B.   3
C.   6
D.   4
Question #7
The nuclear reaction rates in the Sun's core will slow down with an increase in temperature.
A.   True
B.   False
Question #8
Sunspots are now known to be associated with strong magnetic fields. This has been determined by
A.   noticing the temperature of the sunspots was different than surrounding areas.
B.   sending a probe to the Sun to measure the magnetic field directly.
C.   using a compass.
D.   noticing the absorption lines associated with sunspots were split into a number of lines, with close λ values.
Question #9
The Sun (seen using a telescope and appropriate eye-protective devices) shows the same intensity of light emitted all over its entire surface.
A.   False
B.   True
Question #10
The Sun releases enormous amounts of electromagnetic radiation. Huge amounts of that radiation are released as
A.   magnetic fields.
B.   solar minima.
C.   solar flares.
D.   coronal holes.
Question #11
The region (or zone) of the Sun is the region where hot material rises up towards the surface of the Sun and cools down. This "cooled" material drops towards the bottom of the region, where, after it heats up, it rises to the surface again and the cycle repeats.
A.   radiative
B.   chromosphere
C.   convective
D.   pressure
Question #12
The core of the Sun is best described as
A.   hot and rarefied (not dense).
B.   hot and dense.
C.   cool and dense.
D.   cool and rarefied (not dense).
Question #13
The corona emits primarily
A.   Fraunhofer lines
B.   protons and electrons
C.   Zeeman particles
D.   amino acids and mRNA
Question #14
The visible spectrum of the Sun, like that of all stars, is an example of a(n) spectrum, because of all the gaps seen in it.
A.   continuous
B.   absorption
C.   emission
D.   visible spectrum
Question #15
Neon has been identified as one of the elements of the Sun.
A.   True
B.   False
Question #16
The Sun is a -type main sequence star.
A.   Ox7
B.   G2
C.   M1
D.   iOS 8
Question #17
Every day, the Sun loses mass.
A.   False
B.   True

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