WorksheetsPHYS 1303 (Stars and Galaxies) - Exam 3 Review
Total questions: 49
Worksheet time: 25mins
What is the name of our galaxy?
Andromeda
The Milky Way
Triangulum
Whirlpool
What does AGN stand for in astronomy?
Astronomical Galactic Network
Active Galactic Nuclei
Advanced Galactic Nebula
Ancient Galactic Notation
Which concept explains the origin of the universe?
Galactic Evolution
The Big Bang
Dark Matter
Interstellar Matter
What does CMB stand for in cosmology?
Cosmic Microwave Background
Cosmic Magnetic Belt
Central Milky Barrier
Celestial Matter Base
What type of galaxy is the Milky Way most likely classified as?
Elliptical Galaxy
Barred Spiral Galaxy
Irregular Galaxy
Lenticular Galaxy
Approximately how many light years across is the Milky Way?
10,000 Lt Yrs
50,000 Lt Yrs
100,000 Lt Yrs
200,000 Lt Yrs
What is found at the center of the Milky Way's nucleus?
A large star cluster
A supermassive black hole
A nebula
A planetary system
Which type of stars are found in the Milky Way's nuclear bulge?
Young O & B stars
Population I stars
Population II stars
Red giant stars
What is a characteristic of the Milky Way's halo?
Contains interstellar dust
Contains only hot interstellar gas
Contains young stars
Contains a supermassive black hole
What is the primary function of dust in dark nebulae?
Reflects light from nearby stars
Blocks starlight from more distant stars
Emits red light due to hydrogen
Scatters stellar spectra
What color is typically associated with reflection nebulae due to the scattering of light from hot young stars?
Red
Green
Blue
Yellow
What causes the emission spectrum in emission nebulae?
Reflection of light from nearby stars
Absorption of light from distant galaxies
Absorbed light from nearby bright stars causing fluorescence
Scattering of light from the sun
Why is the emission spectrum in emission nebulae typically red in color?
Due to the presence of oxygen
Due to the presence of nitrogen
Due to the presence of hydrogen
Due to the presence of helium
What is a characteristic of barred spiral galaxies?
Spiral arms attached to the ends of the "bar"
Symmetric shape with no arms
No current star formation
Irregular shapes due to collisions
What is a feature of elliptical galaxies?
Presence of a barred central structure
Symmetric shape with little to no interstellar dust
Spiral arms coming from the central bulge
Irregular shapes due to recent formation
Which type of galaxy is more likely to have an Active Galactic Nucleus (AGN)?
Barred spiral galaxies
Elliptical galaxies
Irregular galaxies
Regular spiral galaxies
What is a common trait of irregular galaxies?
Symmetric shape with no arms
No regular shapes, possibly due to collisions
Presence of a barred central structure
Spiral arms attached to the ends of the "bar"
What is thought to be at the center of Active Galactic Nuclei (AGNs)?
Super-Massive Black Holes
Neutron Stars
White Dwarfs
Pulsars
What are Quasars characteristic of?
Earlier universe
Future universe
Present universe
Parallel universe
What does the term "Blasars" refer to?
Looking down the barrel of a Quasar Jet
A type of galaxy
A type of star
A type of nebula
What are Seyfert Galaxies known for?
Emission lines of highly ionized atoms
Absorption lines of neutral atoms
Reflection of light from stars
Absorption of cosmic rays
What are Liners associated with?
Emission lines from neutral or slightly ionized atoms
Absorption lines from highly ionized atoms
Reflection of light from interstellar dust
Absorption of gamma rays
What do Radio-Loud-Lobes interact with?
Intergalactic matter
Cosmic microwave background
Solar wind
Earth's atmosphere
What is less certain than stellar evolution scenarios according to the text?
Galactic evolution
Planetary formation
Star formation
Black hole creation
What formed from smaller pre-galactic "blobs" according to the text?
Larger galaxy-sized objects
Black holes
Nebulae
Star clusters
What type of galaxies formed with all older stars today?
Smaller Elliptical Galaxies
Spiral Galaxies
Irregular Galaxies
Dwarf Galaxies
What type of collisions led to the formation of spirals?
High angular momentum collisions
Low energy collisions
Random collisions
Gravitational collisions
What likely formed from collisions of large spirals?
Giant Ellipticals
Dwarf Galaxies
Star Clusters
Nebulae
Why does galactic rotation not seem to become Keplerian?
Because galaxies are too small
Because of the presence of dark matter
Because of the absence of gravitational forces
Because of the presence of visible matter
What does gravitational lensing by intermediate galactic clusters indicate?
The presence of 2-3 times more mass than visible
The presence of 5-6 times more mass than visible
The presence of equal mass as visible
The absence of any additional mass
Why are intergalactic gas clouds too hot to be held together?
Due to their own visible mass
Due to the absence of dark matter
Due to the presence of dark matter
Due to gravitational forces
What is dark matter not likely to be?
Baryonic
Non-baryonic
Visible
Invisible
What does the clumping of clusters and superclusters of galaxies appear to be like?
Foam-like or froth-like
Solid-like or liquid-like
Gas-like or plasma-like
Crystal-like or glass-like
What are the large regions found in the universe according to the text?
Voids
Stars
Planets
Black holes
What type of structures are apparent in the universe?
Wall-like structures
Spiral-like structures
Dome-like structures
Cube-like structures
When is it thought that the universe's structure was imprinted?
During the Big Bang
During the formation of the solar system
During the creation of the Milky Way
During the first supernova
What indicates that the expansion of the universe is accelerating?
The Supernova project using Type 1A Supernovae
The movement of planets
The rotation of galaxies
The formation of new stars
At what time does our understanding of the evolution of the Universe begin according to the Laws of Physics?
Planck Time ~10^-43 s
Quark Era ~10^-6 s
Grand Unified Theories ~10^-35 s
400,000 years after the Big Bang
What significant event occurred during the Grand Unified Theories (GUT) period?
Formation of atoms
Rapid inflation of the Universe
Separation of the Strong Force
Nucleosynthesis of He and ²H
During which era did the quarks and gluons precipitate into hadrons?
Planck Era
Quark Era
GUT Era
Nucleosynthesis Era
What did the fluctuations in the Quark Era imprint?
Primordial abundances of He and ²H
Large Scale Structure
Formation of atoms
Dark Energy dominance
When did atoms form in the Universe?
During the Planck Time
During the Quark Era
About 400,000 years after the Big Bang
At the end of the first second
What is the Cosmic Microwave Background (CMB) evidence for?
The Universe is expanding at an accelerating rate.
The Universe is Flat and explains the contributions of Visible and Dark Matter and Dark Energy.
The Universe is contracting.
The Universe is static and unchanging.
At what point in time was the light of the Cosmic Microwave Background released?
~1 million years
~400,000 years
~10,000 years
~100,000 years
What does the Cosmic Microwave Background show about the early Universe?
It shows the uniformity in densities.
It shows the variation in densities.
It shows the absence of any density variations.
It shows the increase in densities over time.
What are some of the factors included in the Drake Equation?
Number of stars in the galaxy, fraction in habitable zone, probability of life evolving
Distance from Earth, size of the galaxy, speed of light
Number of black holes, fraction of dark matter, speed of sound
Distance from the Sun, size of planets, number of moons
Which of the following is a Rare Earth Factor?
Need for Jupiter
Distance from the Sun
Number of black holes
Speed of light
What does SETI stand for?
Search for Extra-Terrestrial Intelligence
Space Exploration and Technology Institute
Solar Energy Transmission Initiative
Scientific Exploration of Terrestrial Inhabitants
According to the document, what is the likelihood of primitive life in the universe?
Very likely prolific and common
Extremely rare and unlikely
Only found on Earth
Non-existent
