Astronomy 154 - Elementary Astronomy » Spring 2022 » Quiz 10
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Question #1
The maximum mass of a white dwarf is ______ times the mass of the Sun.
A.
0.4
B.
1.4
C.
1.0
D.
0.1
E.
2.0
F.
3.0
Question #2
A luminous shell of gas ejected from an old low-mass star is called a __________.
A.
auora borealis
B.
planetary nebula
C.
close binary
D.
event horizon
E.
supernova explosion
Question #3
White dwarfs are primarily composed of ____________.
A.
iron
B.
helium
C.
carbon and oxygen
D.
hydrogen
E.
hydrogen and helium
Question #4
The collapse of the iron core in a massive star results in a ____________.
A.
supernova explosion
B.
red giant star
C.
helium flash
D.
planetary nebula
E.
white dwarf
Question #5
What nuclear reaction is the energy source of a white dwarf?
A.
oxygen fusing into silicon
B.
helium fusing into carbon
C.
none
D.
silicon fusing into iron
E.
hydrogen fusing into helium
F.
carbon and helium fusing into oxygen
Question #6
The debris from a supernova explosion is called a supernova _________.
A.
remnant
B.
aftermath
C.
burst
D.
nebula
E.
shockwave
Question #7
A singularity is _________.
A.
the point at the center of a black hole
B.
the stream of jets of x-rays emitted from a pulsar
C.
the remains of a white dwarf supernova
D.
any collapsed object without a companion star
E.
swirling matter surrounding a neutron star
Question #8
Which of the following are thought to be rapidly rotating neutron stars with intense magnetic fields?
A.
pulsars
B.
flare stars
C.
white dwarfs
D.
black holes
E.
accretion disks
Question #9
The boundary of a black hole is called the _____________.
A.
edge of night
B.
radiation vortex
C.
singularity
D.
event horizon
E.
darkness limit
Question #10
An object from which neither matter nor light can escape is called a _________.
A.
neutron star
B.
black hole
C.
white dwarf
D.
planetary nebula
E.
supernova
Question #11
Which of these is closest in size to a neutron star?
A.
Jupiter
B.
City
C.
Solar System
D.
Sun
E.
Earth
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