Navigation » List of Schools » California State University Dominguez Hills » Science, Mathematics and Technology » SMT 314 – Introduction to Cosmology » Fall 2020 » Exam 3
Below are the questions for the exam with the choices of answers:
Question #1
A 45 x 10-4
3.2 x 104
B 4.5 x 103
32 x 103
C 4.5 x 10-3
3.2 x 104
D 4.5 x 10-4
32 x 103
Question #2
A TRUE
B FALSE
Question #3
A move faster than lower-energy photons.
B are not as likely to become redshifted as lower-energy photons.
C have higher frequencies and shorter wavelengths than lower-energy photons.
D travel less distance between their source and the observer than lower-energy photons.
E have more mass than lower-energy photons.
Question #4
A TRUE
B FALSE
Question #5
A an eclipsing binary
B a spectroscopic binary
C impossible, unless at least one of the two stars if itself intrinsically variable.
D a visual binary
E an astrometric binary
Question #6
A FALSE
B TRUE
Question #7
A FALSE
B TRUE
Question #8
A farther
B closer
C the same distance
D now way to tell with available data
Question #9
A FALSE
B TRUE
Question #10
A the coronal mass ejections interfere with the photons, adding too much noise to the spectrum.
B the relatively cool outer layers absorb photons emitted in the hot inner parts of the Sun, producing absorption lines.
C its spectrum consists of emission lines of the elements in the Sun, so there are some gaps.
D the Sun is too hot to radiate at all wavelengths.
E its core is much hotter than its surface, so the shape of the curve is distored.
Question #11
A oscillatory (wobbly) star motions
B 2 visible stars orbiting each other
C converging spectral lines
D varying star intensities
Question #12
A FALSE
B TRUE
Question #13
A Dark clouds hide large gas balls that are ignited by passing stars.
B Gravity causes a cloud of gas & dust to collapse toward a center.
C An explosion throws out mass that settles as a star.
D A large gas ball spins out of a larger star when disrupted by a passing star.
Question #14
A with extra electrons
B with extra neutrinos
C with extra protons
D with extra neutrons
Question #15
A proton-proton chain
B triple alpha process
C nucleosynthesis
D carbon-nitrogen-oxygen cycle
Question #16
A Uranus
B Venus
C Io
D Triton
Question #17
A differential rotation, winding up the magnetic fields
B granulation oscillations
C nuclear explosions
D a constant dipole magnetic field
E the Zeeman effect and the Maunder minimum
Question #18
A FALSE
B TRUE
Question #19
A an ion
B a neutron
C a photon
D a proton
E an electron
Question #20
A distance
B mass
C core temperature
D expansion/contraction
Question #21
A TRUE
B FALSE
Question #22
A Electrons have discrete energy levels.
B Photon emission occurs randomly, in any direction.
C Each element produces a unique pattern of spectral lines, like a fingerprint.
D Absorption occurs when an electron in an atom jumps from a lower energy level to a higher energy level.
E An electron in an atom may absorb either part or all of the energy of a photon.
Question #23
A TRUE
B FALSE
Question #24
A open clusters
B Mira clusters
C megaclusters
D globular clusters
E elliptical galaxies
Question #25
A away from us
B not speed, but energies due to temperature
C across the field of view
D toward us
Question #26
A TRUE
B FALSE
Question #27
A Hydrogen normally has one neutron.
B Hydrogen normally has one proton.
C Normal hydrogen is also called protium.
D Hydrogen normally has one electron.
Question #28
A TRUE
B FALSE
Question #29
A Earth
B Uranus
C Venus
D Mars
Question #30
A FALSE
B TRUE
Question #31
A there is too much material to have fit into the ball of each planet
B tidal forces cause volcanic eruptions on some moons, and part of this material subsequently escaped the gravity of the moons, forming the rings.
C Jovian planets rotate very rapidly, and some material near the equator of these planets was flung outward, forming the rings
D their thick gaseous atmospheres would disintegrate any small rock that enter them
E tidal forces prevent the material in rings from forming into moons
Question #32
A Sirius is located less than 10 ps from Earth.
B This is an impossible situation. The apparent magnitude can’t be more than the absolute magnitude.
C Sirius is located 10 ps from Earth.
D Sirius is located greater then 10 ps from Earth.
Question #33
A TRUE
B FALSE
Question #34
A 4
B 16
C 1/4
D 1/16
Question #35
A 8
B 7
C 10
D 18
Question #36
A Gravitational contraction of a pre-main-sequence star ceases once nuclear reaction begin.
B Stars form from gaint clouds of gas and dust whose collapse and fragmentation (clumping) are due to gravity.
C Contracting balls of gas with masses below about 75 Jupiter masses actually end up as brown dwarfs, not main-sequence stars.
D During gravitational contraction, the temperature in the core of a pre-main-sequence star decreases.
Question #37
A electrons
B neutrons
C protons
D Bohr model
E valence shields
Question #38
A emitted intensity
B photosphere temperature
C speed of light
D fusion density
E core temperature
Question #39
A FALSE
B TRUE
Question #40
A brown giants
B long period variables
C binary stars
D Cepheids
Question #41
A green
B white
C red
D blue
Question #42
A young (< millions of years)
B 5 billion years
C > 10 billion years
Question #43
A FALSE
B TRUE
Question #44
A FALSE
B TRUE
Question #45
A sunspots and heliosiesmology are associated with the photosphere
B the corona is the solar wind
C a photo of the Sun with a x-ray filter will show the chromoshere
D the chromosphere is best viewed with a H-alpha filter
Question #46
A temperature
B gravity
C pressure
D mass
Question #47
A reflecting; the smearing of light due to atmospheric turbulence.
B space; the deformation of the glass due to the absence of gravity.
C refracting; different focal lengths for different wavelengths of light.
D reflecting; differing focal points from different parts of the mirror.
E refracting; the smearing of light due to atmospheric turbulence.
Question #48
A It has one more proton than an average hydrogen atom.
B It has one electron, so it is not an ion.
C It is an isotope of hydrogen.
D It has one neutron and one proton.