Ast 104 Final Exam Study Guide Exam
2023
The science of the universe as a whole is called:
a) proctology.
b) universology.
c) cosmetology.
d)
... [Show More] inflation.
e) cosmology. - Answer-e
The Big Bang is:
a) the explosion of a supernova.
b) the explosion of a star.
c) a theoretical origin of the universe or our pocket universe.
d) the explosion of a quasar.
e) a theoretical end of the universe or our pocket universe. - Answer-c
Given v as recession velocity and r as cosmological physical distance, Hubble's law is:
a) r = Hv.
b) r = H/v.
c) v = Hr.
d) v = H/r.
e) v = Hr^2 - Answer-c
"Let's play Jeopardy! For $100, the answer is: He/she is the person who observationally
discovered Hubble's law."
Who is ________, Alex?
a) Henrietta Swan Leavitt (1868-1921)
b) Knut Lundmark (1889-1958)
c) Edwin Hubble (1889-1953)
d) Georges Lemaˆıtre (1894-1966)
e) Adriaan van Maanen (1884-1946) - Answer-c
The current value of the Hubble time and the Λ-CDM model (AKA the concordance
model) value for the age of the universe are both about:
a) 14 Gyr.
b) 10^100 yr.
c) 10 years.
d) 4.6 Gyr.
e) 0. - Answer-a
The Hubble length is 4.283h (−1 / 70) Gpc (where h70 is the reduced Hubble constant:
it is equal to 1 to within a few percent). It is a characteristic size scale for the:
a) quantum of the inflaton.
b) Milky Way.
c) total universe.
d) observable universe.
e) Solar System. - Answer-d
The Einstein universe presented by Einstein in 1917 is a/an universe model.
a) contracting, hyperspherical
b) expanding, hyperspherical
c) static, hyperspherical
d) static, hypercritical
e) expanding, hypercritical - Answer-c
"Let's play Jeopardy! For $100, the answer is: These models were the among the first
plausible universe models to predict the expansion of the universe." What are the
____________ models, Alex?
a) Alpher-Behte-Gamow
b) Einstein-Lemaˆıtre
c) Einstein
d) Friedmann-equation
e) Gamow - Answer-d
"Let's play Jeopardy! For $100, the answer is: In the Friedmann-equation models, it is
the parameter that that specifies the geometry of the universe: if less than 1, the
universe is hyperbolic and infinite; if equal to 1, the universe is flat and infinite; if greater
than 1, the universe is hyperspherical and finite." What is , Alex?
a) Λ (spelt Lambda)
b) Ψ (spelt Psi)
c) ∆ (spelt Delta)
d) Γ (spelt Gamma)
e) Ω (spelt Omega) - Answer-e
The curvature of space in Friedmann-equation models is determined by the total density
parameter (i.e., total Ω or Omega). This parameter is the ratio of total universal average
mass-energy density to the critical mass-energy density. The curvature possibilities are:
a) hyperbolic (Ω < 1), flat (Ω = 1), and hyperspherical (Ω > 1).
b) hyperspherical (Ω < 1), flat (Ω = 1), and hyperbolic (Ω > 1).
c) hyperbolic (Ω < 1), hyperspherical (Ω = 1), and flat (Ω > 1).
d) spiral (Ω < 1), elliptical (Ω = 1), and irregular (Ω > 1).
e) hypnotical (Ω < 1), sharp (Ω = 1), and hypercritical (Ω > 1). - Answer-a
According to observations of several kinds beginning in 1998, it seems that the
universal expansion is currently:
a) decelerating.
b) stopped.
c) negative: i.e., the universe is contracting.
d) in doubt.
e) accelerating. - Answer-e
The simplest explanation considered for the accelerating expansion of the universe is:
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