ISP205 Test 3 MA Review 2024/2025
Exam Questions and Correct Answers |
New Update
c - 🧠ANSWER ✔✔You learned about the general concept of parallax in
Chapter 2, and the video offers a review of the basic ideas. To check your
understanding of the concept, which of the following is a valid way of
demonstrating parallax for yourself?
a. Get a camera, and photograph a person who is running back and forth.
b. Hold up your hand in front of your face, and move it slowly back and
forth.
c. Hold up your hand in front of your face, and alternately close your left
and right eyes.
d. Look up at a star, and notice how it moves toward the western horizon
during the night.
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,d - 🧠ANSWER ✔✔Which of the following makes it possible for us to
observe stellar parallax (from Earth)?
a. the varying speed of Earth in its orbit around the Sun
b. the gradual change in the patterns of the constellations over thousands
of years
c. the gradual motion of stars in the local solar neighborhood
d. Earth's orbit around the Sun
a - 🧠ANSWER ✔✔Compared to a nearer star, a more distant star will have
a __________.
a. smaller parallax angle
b. larger parallax angle
c. parallax shift taking less time to go back and forth
d. parallax shift taking more time to go back and forth
d - 🧠ANSWER ✔✔Compared to a main-sequence star with a short lifetime,
a main-sequence star with a long lifetime is __________.
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,a. more luminous, hotter, larger, and more massive
b. more luminous, hotter, smaller, and less massive
c. less luminous, cooler, larger, and more massive
d. less luminous, cooler, smaller, and less massive
b - 🧠ANSWER ✔✔Compared to a high-luminosity main-sequence star,
stars in the upper right of the H-R diagram are __________.
a. hotter and larger in radius
b. cooler and larger in radius
c. cooler and smaller in radius
d. hotter and smaller in radius
d - 🧠ANSWER ✔✔Compared to a low-luminosity main-sequence star, stars
in the lower left of the H-R diagram are __________.
a. hotter and larger in radius
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, b. cooler and larger in radius
c. cooler and smaller in radius
d. hotter and smaller in radius
c - 🧠ANSWER ✔✔What do we need to measure in order to determine a
star's luminosity?
a. apparent brightness and mass
b. apparent brightness and temperature
c. apparent brightness and distance
d - 🧠ANSWER ✔✔Assuming that we can measure the apparent brightness
of a star, what does the inverse square law for light allow us to do?
a. Determine both the star's distance and luminosity from its apparent
brightness.
b. Determine the distance to the star from its apparent brightness.
c. Calculate the star's surface temperature if we know either its luminosity
or its distance.
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STATEMENT. ALL RIGHTS RESERVED
Exam Questions and Correct Answers |
New Update
c - 🧠ANSWER ✔✔You learned about the general concept of parallax in
Chapter 2, and the video offers a review of the basic ideas. To check your
understanding of the concept, which of the following is a valid way of
demonstrating parallax for yourself?
a. Get a camera, and photograph a person who is running back and forth.
b. Hold up your hand in front of your face, and move it slowly back and
forth.
c. Hold up your hand in front of your face, and alternately close your left
and right eyes.
d. Look up at a star, and notice how it moves toward the western horizon
during the night.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,d - 🧠ANSWER ✔✔Which of the following makes it possible for us to
observe stellar parallax (from Earth)?
a. the varying speed of Earth in its orbit around the Sun
b. the gradual change in the patterns of the constellations over thousands
of years
c. the gradual motion of stars in the local solar neighborhood
d. Earth's orbit around the Sun
a - 🧠ANSWER ✔✔Compared to a nearer star, a more distant star will have
a __________.
a. smaller parallax angle
b. larger parallax angle
c. parallax shift taking less time to go back and forth
d. parallax shift taking more time to go back and forth
d - 🧠ANSWER ✔✔Compared to a main-sequence star with a short lifetime,
a main-sequence star with a long lifetime is __________.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,a. more luminous, hotter, larger, and more massive
b. more luminous, hotter, smaller, and less massive
c. less luminous, cooler, larger, and more massive
d. less luminous, cooler, smaller, and less massive
b - 🧠ANSWER ✔✔Compared to a high-luminosity main-sequence star,
stars in the upper right of the H-R diagram are __________.
a. hotter and larger in radius
b. cooler and larger in radius
c. cooler and smaller in radius
d. hotter and smaller in radius
d - 🧠ANSWER ✔✔Compared to a low-luminosity main-sequence star, stars
in the lower left of the H-R diagram are __________.
a. hotter and larger in radius
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
, b. cooler and larger in radius
c. cooler and smaller in radius
d. hotter and smaller in radius
c - 🧠ANSWER ✔✔What do we need to measure in order to determine a
star's luminosity?
a. apparent brightness and mass
b. apparent brightness and temperature
c. apparent brightness and distance
d - 🧠ANSWER ✔✔Assuming that we can measure the apparent brightness
of a star, what does the inverse square law for light allow us to do?
a. Determine both the star's distance and luminosity from its apparent
brightness.
b. Determine the distance to the star from its apparent brightness.
c. Calculate the star's surface temperature if we know either its luminosity
or its distance.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
