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ASTRO 1 EXAM 2 NEWEST 2025/ 2026 ACTUAL EXAM
COMPLETE 150 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST VERSION!!!
What moon is NOT massive enough to be a planet if it
orbited the Sun?
A. Ganymede
B. Titan
C. Europa - ANSWER-C. Europa
Which of Jupiters moons is volcanically active?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-A. Io
Which of Jupiters moons has the largest mass?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-C. Ganymede
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Which of Jupiters moons potentially has a subsurface
ocean?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-B. Europa
Which of Jupiters moons is a large cratered ice ball?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-D. Callisto
Saturn has the same radius as Jupiter but is only ____ of
the mass.
A. 15%
B. 20%
C. 25%
D. 30% - ANSWER-B. 20%
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Saturn - ANSWER-6th planet
complex ring system
many moons, including Titan
Uranus and Neptune are only ___ times the radius of
Earth, while Saturn and Jupiter are 10 times.
A. 4
B. 5
C. 2
D. 3 - ANSWER-A. 4
Uranus and Neptune composition - ANSWER-water,
methane, ammonia, some H, He, and rock
Uranus axis tilt - ANSWER-extreme about 98 degrees on
its side
Which major moon of Neptune rotates backwards?
A. Titan
B. Io
C. Tritan
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D. Europa - ANSWER-C. Tritan
Dwarf Planets - ANSWER-massive enough to for own
gravity to make them round
icy, comet-like composition
biggest objects in Kuiper Belt
have moons
Plutos big moon - ANSWER-Cairne
- form binary system their center of gravity is between
them
Comets tails come from - ANSWER-Icy nucleus turning to
gas when entering inner solar system
If radioactive element A decays into radioactive element B
with a half-life of 20 seconds, then after 40 seconds:
A. all of element A will be gone
B. all of element B will be gone
C. half of element A will remain
ASTRO 1 EXAM 2 NEWEST 2025/ 2026 ACTUAL EXAM
COMPLETE 150 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST VERSION!!!
What moon is NOT massive enough to be a planet if it
orbited the Sun?
A. Ganymede
B. Titan
C. Europa - ANSWER-C. Europa
Which of Jupiters moons is volcanically active?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-A. Io
Which of Jupiters moons has the largest mass?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-C. Ganymede
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Which of Jupiters moons potentially has a subsurface
ocean?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-B. Europa
Which of Jupiters moons is a large cratered ice ball?
A. Io
B. Europa
C. Ganymede
D. Callisto - ANSWER-D. Callisto
Saturn has the same radius as Jupiter but is only ____ of
the mass.
A. 15%
B. 20%
C. 25%
D. 30% - ANSWER-B. 20%
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Saturn - ANSWER-6th planet
complex ring system
many moons, including Titan
Uranus and Neptune are only ___ times the radius of
Earth, while Saturn and Jupiter are 10 times.
A. 4
B. 5
C. 2
D. 3 - ANSWER-A. 4
Uranus and Neptune composition - ANSWER-water,
methane, ammonia, some H, He, and rock
Uranus axis tilt - ANSWER-extreme about 98 degrees on
its side
Which major moon of Neptune rotates backwards?
A. Titan
B. Io
C. Tritan
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D. Europa - ANSWER-C. Tritan
Dwarf Planets - ANSWER-massive enough to for own
gravity to make them round
icy, comet-like composition
biggest objects in Kuiper Belt
have moons
Plutos big moon - ANSWER-Cairne
- form binary system their center of gravity is between
them
Comets tails come from - ANSWER-Icy nucleus turning to
gas when entering inner solar system
If radioactive element A decays into radioactive element B
with a half-life of 20 seconds, then after 40 seconds:
A. all of element A will be gone
B. all of element B will be gone
C. half of element A will remain
