Transcript
UNIT 5Stars and Galaxies
Basketball Review
QUESTION 1• The standard distance astronomers
have adapted when calculating absolute visual magnitude is
A. 1 pcB. 10 pcC. 100 pcD. 1000 pc
QUESTION 2• The total energy a star radiates in one
second is know as itsA. FluxB. TemperatureC. RadiationD. Luminosity
QUESTION 3• Where are white dwarfs located on
the HR diagram?A. CenterB. Upper leftC. Lower leftD. Lower right
QUESTION 4• The most common place on the HR
diagram is which section of stars?A. SupergiantsB. GiantsC. Main-sequenceD. White dwarfs
QUESTION 5• Compared to the Balmer lines of Hydrogen
in the spectra of a supergiant star, a main-sequence star consists of Balmer lines that are considerably
A. broaderB. narrowerC. strongerD. weaker
QUESTION 6• Which of the following Roman
Numerals is representative of the luminosity class for a giant star?
A. IbB. IIIC. VD. VII
QUESTION 7• What percentage of stars in our
Milky Way galaxy are binary stars?A. < 1%B. 10%C. 25%D. > 50%
QUESTION 8• Which of the following is not a type
of binary star system?A. VisualB. StellarC. SpectroscopicD. Eclipsing
QUESTION 9• What marks the first stage of a star’s
development, only detectable at IR wavelengths?
A. nebulaB. protostarC. main-sequenceD. dwarf
QUESTION 10• Stars below _____ do not get hot
enough to ignite nuclear fusion and are known as brown dwarfs.
A. 0.01 M8
B. 0.08 M8
C. 0.15 M8
D. 1.04 M8
QUESTION 11• Which of the following is not one of
the laws of stellar structure?A. Hydrostatic equilibriumB. Convection coefficientC. Energy transportD. Conservation of mass
QUESTION 12• Which of the following star groups
has the longest lifetime?A. Red dwarfsB. Mid main-sequenceC. GiantsD. Supergiants
QUESTION 13• The lifetime expectancy of our Sun isA. 5 million yearsB. 10 million yearsC. 5 billion yearsD. 10 billion years
QUESTION 14• When a gas is so dense its electrons
are no longer free to change their energy, astronomers refer to it as
A. Instable matterB. Degenerate matterC. Invisible matterD. Dark matter
QUESTION 15• Helium fusion into Carbon during the
Red Giant stage of a star is also referred to as the
A. Carbon-Nitrogen-Oxygen CycleB. Beta Particle SynthesisC. Thermonuclear CarbonationD. Triple Alpha Process
QUESTION 16• The onset of Helium fusion occurs
very quickly in an event known as aA. Hydrogen disposalB. Red Giant initiationC. Helium flashD. Nova explosion
QUESTION 17• When a dying giant star expels its outer
atmosphere in repeated surges, a _____ is likely to result; also considered to “final breath” of medium-mass stars.
A. Nova explosionB. White dwarfC. Planetary nebulaD. Supernova
QUESTION 18• A star’s collapsing core more massive
than 1.4 M8 cannot become a white dwarf because this represents the
A. Event HorizonB. Chandrasekhar LimitC. Singularity PointD. Mass Boundary
QUESTION 19• During the evolution of binary starsA. Mass remains with the larger star throughout
the duration of its life.B. The two stars will combine forming a massive
supernova.C. A transfer of mass occurs repeatedly between
the two stars.D. Both stars collide and ultimately form a black
hole.
QUESTION 20• Heavy element fusion ends with
what element being produced?A. IronB. SiliconC. CarbonD. Neon
QUESTION 21• Which nebula is a supernova
remnant?A. CrabB. HelixC. HourglassD. Cat’s Eye
QUESTION 22• What is the main difference between a Type I
and a Type II supernova?A. Type I are visible for a shorter amount of time
than Type IIB. Type II are more intense than Type IC. Type I have spectra containing no Hydrogen
linesD. Type II have no spectra produced due to their
high intensity
QUESTION 23• Spinning neutron stars are known asA. neutrinosB. jetsC. pulsarsD. radials
QUESTION 24• The upper mass limit for the
collapsing core of a neutron star isA. 1.4 M8
B. 2.1 M8
C. 3.0 M8
D. 4.7 M8
QUESTION 25• Which of the following is not a type
of galaxy?A. SpiralB. EllipticalC. SphericalD. Irregular
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