UNIT 5 BASKETBALL REVIEW

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