ISP 205 Exam 1 Review 2024/2025 Exam
Questions and Corresponding Answers
with Surety of 100% Pass Mark
The Andromeda Galaxy is faintly visible to the naked eye in the
constellation Andromeda. Suppose instead it were located in the same
direction in space as the center of the Milky Way Galaxy (but still at its
current distance). How would it appear to the eye in that case?
a) It would be much brighter because it would be illuminated by the many
stars in the center of our galaxy.
b)It would look about the same, but it would be harder to pick out because
its cloud-like appearance would make it blend in with the cloud-like
appearance of the Milky Way in our sky.
c) It would look about the same but would be in the constellation Sagittarius
instead of Andromeda.
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,d) We could not see it at all. - 🧠ANSWER ✔✔d) We could not see it at all.
Could we see a galaxy that is 20 billion light-years away? (Assume that we
mean a "lookback time" of 20 billion years.)
a) No, because it would be beyond the bounds of our observable universe.
b) No, because a galaxy could not possibly be that far away.
c) Yes, we have already detected galaxies at that distance.
d) Yes, if we had a big enough telescope. - 🧠ANSWER ✔✔a) No, because
it would be beyond the bounds of our observable universe.
Suppose it is full moon. What phase of Earth would someone on the Moon
see at this time?
a) first-quarter Earth
b) new Earth
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,c) full Earth
d) Earth does not go through phases as seen from the Moon. - 🧠ANSWER
✔✔b) new Earth
Which of the following is not part of a good scientific theory?
a) A scientific theory must make testable predictions that, if found to be
incorrect, could lead to its own modification or demise.
b) A scientific theory cannot be accepted until it has been proven true
beyond all doubt.
c) A scientific theory should be based on natural processes and should not
invoke the supernatural or divine.
d) A scientific theory must explain a wide variety of phenomena observed in
the natural world. - 🧠ANSWER ✔✔b) A scientific theory cannot be
accepted until it has been proven true beyond all doubt.
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, Relative to the age of the universe, how old is our solar system?
a) It is nearly the same age as the universe.
b) It is about 1% as old as the universe.
c) It is between about 5% and 10% as old as the universe.
d) It is about one-third the age of the universe. - 🧠ANSWER ✔✔d) It is
about one-third the age of the universe.
For most of history, the lack of observable stellar parallax was interpreted
to mean that _________.
a) stars must all lie at the same distance from Earth, on the celestial sphere
b) Earth is stationary at the center of the universe
c) stars were too far away for parallax to be measured with available
technology
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Questions and Corresponding Answers
with Surety of 100% Pass Mark
The Andromeda Galaxy is faintly visible to the naked eye in the
constellation Andromeda. Suppose instead it were located in the same
direction in space as the center of the Milky Way Galaxy (but still at its
current distance). How would it appear to the eye in that case?
a) It would be much brighter because it would be illuminated by the many
stars in the center of our galaxy.
b)It would look about the same, but it would be harder to pick out because
its cloud-like appearance would make it blend in with the cloud-like
appearance of the Milky Way in our sky.
c) It would look about the same but would be in the constellation Sagittarius
instead of Andromeda.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,d) We could not see it at all. - 🧠ANSWER ✔✔d) We could not see it at all.
Could we see a galaxy that is 20 billion light-years away? (Assume that we
mean a "lookback time" of 20 billion years.)
a) No, because it would be beyond the bounds of our observable universe.
b) No, because a galaxy could not possibly be that far away.
c) Yes, we have already detected galaxies at that distance.
d) Yes, if we had a big enough telescope. - 🧠ANSWER ✔✔a) No, because
it would be beyond the bounds of our observable universe.
Suppose it is full moon. What phase of Earth would someone on the Moon
see at this time?
a) first-quarter Earth
b) new Earth
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STATEMENT. ALL RIGHTS RESERVED
,c) full Earth
d) Earth does not go through phases as seen from the Moon. - 🧠ANSWER
✔✔b) new Earth
Which of the following is not part of a good scientific theory?
a) A scientific theory must make testable predictions that, if found to be
incorrect, could lead to its own modification or demise.
b) A scientific theory cannot be accepted until it has been proven true
beyond all doubt.
c) A scientific theory should be based on natural processes and should not
invoke the supernatural or divine.
d) A scientific theory must explain a wide variety of phenomena observed in
the natural world. - 🧠ANSWER ✔✔b) A scientific theory cannot be
accepted until it has been proven true beyond all doubt.
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STATEMENT. ALL RIGHTS RESERVED
, Relative to the age of the universe, how old is our solar system?
a) It is nearly the same age as the universe.
b) It is about 1% as old as the universe.
c) It is between about 5% and 10% as old as the universe.
d) It is about one-third the age of the universe. - 🧠ANSWER ✔✔d) It is
about one-third the age of the universe.
For most of history, the lack of observable stellar parallax was interpreted
to mean that _________.
a) stars must all lie at the same distance from Earth, on the celestial sphere
b) Earth is stationary at the center of the universe
c) stars were too far away for parallax to be measured with available
technology
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STATEMENT. ALL RIGHTS RESERVED
