PHYS 284 ALL FINAL EXAM Q&A
CONCORDIA UNIVERSITY CERTIFICATION
STUDY GUIDE 2026 COMPLETE VERIFIED
ANSWERS GRADED A+
⩥ Which of the following has your "address" in the correct order?
A) you, Earth, solar system, Local Group, Local Supercluster, Milky
Way
B) you, Earth, solar system, Milky Way, Local Supercluster, Local
Group
C) you, Earth, solar system, Local Group, Milky Way, Local
Supercluster
D) you, Earth, Local Group, Local Supercluster, solar system, Milky
Way
E) you, Earth, solar system, Milky Way, Local Group, Local
Supercluster. Answer: E) you, Earth, solar system, Milky Way, Local
Group, Local Supercluster
⩥ About where is our solar system located within the Milky Way
Galaxy?
A) at the center of the galaxy
,B) about 10 percent of the way from the center of the galaxy to the
outskirts of the galactic disk
C) about two-thirds of the way from the center of the galaxy to the
outskirts of the galactic disk
D) near the far outskirts of the galactic disk
E) in the halo of the galaxy above the galactic disk. Answer: C) about
two-thirds of the way from the center of the galaxy to the outskirts of the
galactic disk
⩥ Roughly how many stars are in the Milky Way Galaxy?
A) 1 billion
B) 100 billion
C) 10 billion
D) 100 million
E) 100 trillion. Answer: B) 100 billion
⩥ Modern telescopes are capable of seeing bright galaxies up to about
A) 1 million light-years away.
B) 10 million light-years away.
C) 1 billion light-years away.
D) 10 billion light-years away.
,E) 1 trillion light-years away.. Answer: D) 10 billion light-years away.
⩥ Suppose we imagine the Sun to be about the size of a grapefruit. How
big an area would the orbits of the eight planets of the solar system
cover?
A) the size of a typical dorm room
B) the size of a typical campus building
C) the size of a typical campus
D) the size of a small city
E) the size of a western state (e.g., Colorado). Answer: C) the size of a
typical campus
⩥ What do we mean when we say that the universe is expanding?
A) Average distances are increasing between star systems within
galaxies.
B) Everything in the universe is gradually growing in size.
C) Average distances are increasing between galaxies.
D) The statement is not meant to be literal; rather, it means that our
knowledge of the universe is growing.
E) Individual galaxies are gradually growing in size.. Answer: C)
Average distances are increasing between galaxies.
, ⩥ The age of the universe is
A) between 10 million and 16 million years.
B) between 100 million and 160 million years.
C) between 1 billion and 1.6 billion years.
D) between 10 billion and 16 billion years.
E) between 100 billion and 160 billion years.. Answer: D) between 10
billion and 16 billion years.
⩥ How are galaxies important to our existence?
A) Without galaxies, there could not have been a Big Bang.
B) Without galaxies, the universe could not be expanding.
C) Galaxies prevent planets from leaving their orbits around stars; e.g.,
our galaxy prevents Earth from leaving its orbit of the Sun.
D) Galaxies recycle heavy elements produced in stars into future
generations of stars.
E) Galaxies provide the gravity that prevents us from falling off Earth..
Answer: D) Galaxies recycle heavy elements produced in stars into
future generations of stars.
⩥ Earth is made mostly of metals and rocks. Where did this material
come from?
CONCORDIA UNIVERSITY CERTIFICATION
STUDY GUIDE 2026 COMPLETE VERIFIED
ANSWERS GRADED A+
⩥ Which of the following has your "address" in the correct order?
A) you, Earth, solar system, Local Group, Local Supercluster, Milky
Way
B) you, Earth, solar system, Milky Way, Local Supercluster, Local
Group
C) you, Earth, solar system, Local Group, Milky Way, Local
Supercluster
D) you, Earth, Local Group, Local Supercluster, solar system, Milky
Way
E) you, Earth, solar system, Milky Way, Local Group, Local
Supercluster. Answer: E) you, Earth, solar system, Milky Way, Local
Group, Local Supercluster
⩥ About where is our solar system located within the Milky Way
Galaxy?
A) at the center of the galaxy
,B) about 10 percent of the way from the center of the galaxy to the
outskirts of the galactic disk
C) about two-thirds of the way from the center of the galaxy to the
outskirts of the galactic disk
D) near the far outskirts of the galactic disk
E) in the halo of the galaxy above the galactic disk. Answer: C) about
two-thirds of the way from the center of the galaxy to the outskirts of the
galactic disk
⩥ Roughly how many stars are in the Milky Way Galaxy?
A) 1 billion
B) 100 billion
C) 10 billion
D) 100 million
E) 100 trillion. Answer: B) 100 billion
⩥ Modern telescopes are capable of seeing bright galaxies up to about
A) 1 million light-years away.
B) 10 million light-years away.
C) 1 billion light-years away.
D) 10 billion light-years away.
,E) 1 trillion light-years away.. Answer: D) 10 billion light-years away.
⩥ Suppose we imagine the Sun to be about the size of a grapefruit. How
big an area would the orbits of the eight planets of the solar system
cover?
A) the size of a typical dorm room
B) the size of a typical campus building
C) the size of a typical campus
D) the size of a small city
E) the size of a western state (e.g., Colorado). Answer: C) the size of a
typical campus
⩥ What do we mean when we say that the universe is expanding?
A) Average distances are increasing between star systems within
galaxies.
B) Everything in the universe is gradually growing in size.
C) Average distances are increasing between galaxies.
D) The statement is not meant to be literal; rather, it means that our
knowledge of the universe is growing.
E) Individual galaxies are gradually growing in size.. Answer: C)
Average distances are increasing between galaxies.
, ⩥ The age of the universe is
A) between 10 million and 16 million years.
B) between 100 million and 160 million years.
C) between 1 billion and 1.6 billion years.
D) between 10 billion and 16 billion years.
E) between 100 billion and 160 billion years.. Answer: D) between 10
billion and 16 billion years.
⩥ How are galaxies important to our existence?
A) Without galaxies, there could not have been a Big Bang.
B) Without galaxies, the universe could not be expanding.
C) Galaxies prevent planets from leaving their orbits around stars; e.g.,
our galaxy prevents Earth from leaving its orbit of the Sun.
D) Galaxies recycle heavy elements produced in stars into future
generations of stars.
E) Galaxies provide the gravity that prevents us from falling off Earth..
Answer: D) Galaxies recycle heavy elements produced in stars into
future generations of stars.
⩥ Earth is made mostly of metals and rocks. Where did this material
come from?
