MSU ISP 205 ACTUAL TEST PAPER
COMPLETE SOLUTION VIEW AHEAD
●● Which of the following is largest?
A. the distance to the nearest star
B. 10,000 light-years
C. size of a typical galaxy
D. size of the Local Group
Answer: D
●● How are galaxies important to our existence?
A. Without galaxies, there could not have been a Big Bang.
B. Deep in their centers, galaxies created the elements from which we
are made.
C. Without galaxies, the universe could not be expanding.
,D. Galaxies recycle material from one generation of stars to the next,
and without this recycling we could not exist.
Answer: D
●● If you made a scale model of the universe in which the Sun was the
size of a grapefruit (15 cm diameter), about how large would Earth be in
the scale model?
A: a little less than the width of a human hair (0.15 millimeters)
B: about the size of a grape (1.5 centimeters)
C: about the size of a grapefruit (15 centimeters)
D: about the size of a small seed (1.5 millimeters)
Answer: D
●● Suppose you observe a distant galaxy and determine that the light
you're collecting from that galaxy was emitted twelve billion years ago
and is just reaching you now. What can you conclude about the galaxy?
A. The light you're collecting is showing you what the galaxy looked
like when it was 13.7 billion years old.
, B. The photons you're collecting from the galaxy are two billion years
old.
C. The photons you're collecting from the galaxy are 13.7 billion years
old.
D: The light you're collecting is showing you what the galaxy looked
like when it was less than two billion years old.
E: The light you're collecting is showing you what the galaxy looked
like when it was twelve billion years old.
Answer: D
●● What do we mean by the observable universe?
A:the part of the universe that could be observed in principle, including
things that may require future technologies
B: the entire universe, since it is inconceivable that there could be parts
of the universe that we cannot observe
C: the part of the universe that we can see with the naked eye
COMPLETE SOLUTION VIEW AHEAD
●● Which of the following is largest?
A. the distance to the nearest star
B. 10,000 light-years
C. size of a typical galaxy
D. size of the Local Group
Answer: D
●● How are galaxies important to our existence?
A. Without galaxies, there could not have been a Big Bang.
B. Deep in their centers, galaxies created the elements from which we
are made.
C. Without galaxies, the universe could not be expanding.
,D. Galaxies recycle material from one generation of stars to the next,
and without this recycling we could not exist.
Answer: D
●● If you made a scale model of the universe in which the Sun was the
size of a grapefruit (15 cm diameter), about how large would Earth be in
the scale model?
A: a little less than the width of a human hair (0.15 millimeters)
B: about the size of a grape (1.5 centimeters)
C: about the size of a grapefruit (15 centimeters)
D: about the size of a small seed (1.5 millimeters)
Answer: D
●● Suppose you observe a distant galaxy and determine that the light
you're collecting from that galaxy was emitted twelve billion years ago
and is just reaching you now. What can you conclude about the galaxy?
A. The light you're collecting is showing you what the galaxy looked
like when it was 13.7 billion years old.
, B. The photons you're collecting from the galaxy are two billion years
old.
C. The photons you're collecting from the galaxy are 13.7 billion years
old.
D: The light you're collecting is showing you what the galaxy looked
like when it was less than two billion years old.
E: The light you're collecting is showing you what the galaxy looked
like when it was twelve billion years old.
Answer: D
●● What do we mean by the observable universe?
A:the part of the universe that could be observed in principle, including
things that may require future technologies
B: the entire universe, since it is inconceivable that there could be parts
of the universe that we cannot observe
C: the part of the universe that we can see with the naked eye
