Navigation » List of Schools » California State University Dominguez Hills » Science, Mathematics and Technology » SMT 314 – Introduction to Cosmology » Fall 2020 » Exam 4
Below are the questions for the exam with the choices of answers:
Question #1
A an expelled shell of gas
B an exploding white dwarf
C a small black hole
D a planet atmosphere
Question #2
A helium
B silica & sulphur
C iron
D carbon & oxygen
E deuterium & tritium
Question #3
A supernova explosions
B gravity
C gas & dust
D ignition
Question #4
A absorption
B reflection
C dust
D emission
Question #5
A spiral arms
B dark matter halo
C stellar halo
D nuclear bulge
Question #6
A the collision of two neutron stars or two black holes
B Binary system with a white dwarf
C Sun-like star
D Supergiant
Question #7
A Sun-like star
B Binary system with a white dwarf
C Supergiant
D the collision of two neutron stars or two black holes
Question #8
A Binary system with a white dwarf
B the collision of two neutron stars or two black holes
C Supergiant
D Sun-like star
Question #9
A Sun-like star
B Binary system with a white dwarf
C the collision of two neutron stars or two black holes
D Supergiant
Question #10
A the collision of two neutron stars or two black holes
B Supergiant
C Binary system with a white dwarf
D Sun-like star
Question #11
A Sun-like star
B Supergiant
C Binary system with a white dwarf
D the collision of two neutron stars or two black holes
Question #12
A Binary system with a white dwarf
B Sun-like star
C Supergiant
D the collision of two neutron stars or two black holes
Question #13
A TRUE
B FALSE
Question #14
A Mars
B Earth
C Uranus
D Venus
Question #15
A the diminished brightness of starlight in the galaxy core, relative to surrounding areas.
B the color of the galaxy.
C the distance of the galaxy from the Milky Way Galaxy.
D the speeds of the stars near the core.
E the total mass of the galaxy.
Question #16
A the Universe is expanding in a exponential fashion, accelerating faster and faster.
B collapsing very slowly.
C maintaining the same size.
D the Universe is expanding in a linear fashion with constant speed.
Question #17
A FALSE
B TRUE
Question #18
A FALSE
B TRUE
Question #19
A 11,700,000 light years
B 117,000,000 years
C 11,700,000 years
D 1,170,000 years
Question #20
A Super-clusters are uniform & homogeneous across the universe.
B Super-clusters expand outward from a Big Bang source.
C Filaments of galaxies surround voids that have no or very few galaxies inside.
D Each cluster of galaxies is the same size.
Question #21
A Astronomers can learn about the evolution of galaxies with images of the same galaxies taken by Edwin Hubble in the early 20th century.
B Our Milky Way Galaxy and the Andromeda Galaxy are likely to form an elliptical galaxy at some time in the future.
C At least some galaxies formed from the joining together (merging) of small groups of stars.
D In the past, there existed a population of small, blue, irregular galaxies that have either merged together or faded from view.
E Most elliptical galaxies formed within the first few billion years after the big bang.
Question #22
A Roche Limit
B center of mass
C Roche Lobe
D gravitational funnel
Question #23
A FALSE
B TRUE
Question #24
A FALSE
B TRUE
Question #25
A Triton
B Io
C Uranus
D Venus
Question #26
A FALSE
B TRUE
Question #27
A Hubble’s law alone implies that as the distance of a particular galaxy increases with time, it moves away from us progressively faster; in other words, it’s accelerating away from us.
B Hubble’s law can be used to determine the lookback times of distant galaxies – that is, how far back in time we are seeing them.
C Despite the expansion of the Universe, pairs of galaxies can still sometimes move toward each other and even merge together.
D If Galaxies Luke and Yoda both satisfy Hubble’s law, and Galaxy Luke’s distance is three times Galaxy Yoda’s distance, then Galaxy Luke is moving away from us three times faster than Galaxy Yoda.
Question #28
A FALSE
B TRUE
Question #29
A elliptical
B dwarf
C lenticular
D spiral
E irregular
Question #30
A neighboring giant
B passing nebulae (cocoon)
C outer shells of gas
D supernovae
E nearby main sequence cluster stars
Question #31
A 1/16
B 4
C 1
D 16
E 1/4
Question #32
A FALSE
B TRUE
Question #33
A Spiral arms contain most of the hot, young, massive stars.
B Emission nebulae are mostly found in spiral arms.
C Spiral arms consist mostly of dark matter.
D Clouds of gas and dust are mostly found in spiral arms.
E Spiral arms are usually the most prominent features in the disk.
Question #34
A HIII regions
B HII regions
C HI regions
D Type Ia regions
Question #35
A It has one neutron and one proton.
B It is an isotope of hydrogen.
C It has one electron, so it is not an ion.
D It has one more proton than an average hydrogen atom.
Question #36
A globular star clusters.
B giant molecular clouds in spiral arms.
C the Galactic bulge.
D the Galactic halo.
E the central supermassive black hole.
Question #37
A the core expands and thus cools down.
B the core remains about the same size, but heats up as fusion of helium to carbon begins immediately after the hydrogen fuel is gone.
C the core contracts and thus cools down.
D the core expands and thus heats up.
E the core contracts and thus heats up.
Question #38
A FALSE
B TRUE
Question #39
A 5.6 x 107
1.2 x 101
B 5.6 x 108
1.2 x 101
C 5.6 x 107
1.2 x 10-1
D 5.6 x 108
1.2 x 10-1
Question #40
A dust and gas
B one black hole
C a Blue Supergiant
D a captured galaxy
Question #41
A Cepheid variables
B red supergiants
C super massive black holes
D sun-like stars
E white dwarfs
Question #42
A FALSE
B TRUE
Question #43
A Find an astrometric binary with a massive companion.
B Identify an accretion disk emitting x-rays.
C All of these answers would work.
D Find star(s) orbiting a blank spot.
Question #44
A lenticular
B dwarf
C irregular
D elliptical
E spiral
Question #45
A dust grains in molecular clouds.
B the atomic hydrogen spin-flip transition.
C carbon monoxide (CO) molecules.
D electrons in hydrogen atoms jumping from the third to the second energy levels.
E the rotation of hydrogen molecules.
Question #46
A none of these
B dark matter
C dark energy
D stars, protons, neutrons, electrons
Question #47
A are the end states only of stars whose initial mass if much greater than that of the Sun.
B shine only while nuclear reactions continue within them.
C consist largely of carbon and oxygen.
D consist largely of uranium and other very heavy elements.
E support themselves against the pull of gravity in the same way as normal stars link the Sun, using the pressure exerted by hot gases within them.
Question #48
A TRUE
B FALSE
Question #49
A New stars generally form in the spiral arms.
B It is difficult to see the central regions of our Galaxy in optical (visible) light because intervening dust absorbs and scatters light.
C Nebulae such as the Orion Nebula are stellar nurseries – regions where new stars are forming, or recently formed.
D Rapid motions of stars near the center suggest that it harbors a black hole, millions of times the mass of our Sun.
E Globular star clusters reside in the halo and contain main-sequence stars spanning all spectral types, from O through M.
Question #50
A white dwarf
B black hole
C neutron star
D supernova
Question #51
A matter accreted from a companion star unstably ignites on the surface of a white dwarf
B an extremely massive star collapses, and also ejects its outer atmosphere.
C a neutron star’s magnetic field becomes strong enough to produce two oppositely directed jets of rapidly moving particles.
D a red-giant star ejects a planetary nebula.
E two neutron stars merge, forming a more massive neutron star.