Galaxies and the Universe
Practice Test
1.
Where are the oldest stars in the galaxy located?
SC.E.2.4
a.
bulge only
b.
black holes
c.
halo and bulge
d.
spiral arms
2.
What theory does cosmic background radiation support?
SC.E.2.4.5
a.
the steady-state theory
b.
the Big Bang theory
c.
the theory of evolution
d.
the inflationary universe model
3.
In the Big Bang theory, what balances the momentum of the expansion of the universe?
SC.E.2.4.5
a.
the momentum of the galaxies
b.
the critical density of the universe
c.
the outward force of gravity
d.
the inward force of gravity
4.
The redshift of quasars measures __________.
SC.E.2.4.3
a.
their distance from Earth
b.
their intensity
c.
their age of formation
d.
their shape
5.
What do scientists use to measure Earth's distance from globular clusters?
SC.E.2.4.6
a.
the Hubble constant
b.
the Milky Way
c.
variable stars
d.
the steady-state theory
6.
What is located at the center of the Milky Way?
SC.E.2.4
a.
gas clouds
b.
a supermassive black hole
c.
a supernova
d.
gamma rays
7.
What was the first galaxy to be discovered outside of Earth's galaxy?
SC.E.2.4.2
a.
the Virgo
b.
the Sagittarius Galaxy
c.
the Local Group
d.
the Andromeda Galaxy
8.
Where are the youngest stars of the galaxy located?
SC.E.2.4
a.
black holes
b.
halo
c.
spiral arms
d.
central bulge
9.
What are the oldest-known objects in the Milky Way?
SC.E.2.4
a.
active galactic nuclei
b.
dwarf ellipticals
c.
globular clusters
d.
black holes
10.
Galaxies that are extremely bright are called __________.
SC.E.2.4.2
a.
spiral galaxies
b.
radio galaxies
c.
active galactic nuclei
d.
superclusters
11.
What do astronomers use to map the shape of the Milky Way?
SC.E.2.4
a.
gamma rays
b.
infrared rays
c.
visible light
d.
radio waves
12.
Most of the mass in cluster galaxies is __________.
SC.E.2.4.2
a.
pulsating
b.
visible
c.
spinning
d.
invisible
13.
Look at the scale in the figure. Infer why our sun will never become a black hole.
SC.E.2.4.1
a.
it's not in the center of a galaxy
b.
it has too much gas
c.
it's too big
d.
it's too small
14.
What theory suggests that the universe does not change with time?
SC.E.2.4.5
a.
the inflationary universe model
b.
the theory of plate tectonics
c.
the steady-state theory
d.
the Big Bang theory
15.
How did Hubble categorize galaxies?
SC.E.2.4.2
a.
pulsating variable stars
b.
luminosity
c.
shapes
d.
distance from the Milky Way
