A100 COMPREHENSIVE EXAM 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Which planet, other than Earth, has visible water ice on it?
A. Mercury
B. Venus
C. the Moon
D. Mars
E. Jupiter . Answer: D
◉ Which of the following is furthest from the Sun?
A. Pluto
B. an asteroid in the asteroid belt
C. Neptune
D. a comet in the Kuiper Belt
E. a comet in the Oort cloud . Answer: E
◉ Which planet does NOT have a ring system?
,A. Jupiter
B. Venus
C. Neptune
D. Uranus
E. Saturn . Answer: B
◉ Which of the following is NOT a characteristic of the inner
planets?
A. They are relatively smaller than the outer planets
B. They all have solid, rocky surfaces
C. Their orbits are relatively closely spaced
D. They all have substantial atmospheres
E. They have very few, if any, satellites . Answer: D
◉ Which of the following is NOT a characteristic of the outer
planets?
A. They have very few, if any, satellites
B. They are all large balls of gas
C. They are primarily made of hydrogen and helium
,D. Their orbits are separated by relatively large distances
E. They all have rings . Answer: A
◉ Where are most of the known asteroids found?
A. between the orbits of Mars and Jupiter
B. in the Kuiper Belt
C. in the Oort Cloud
D. between the orbits of the jovian planets
E. between the orbits if the terrestrial planets . Answer: A
◉ Which of the following is NOT an exception to the general patterns
of motion in the solar system?
A. the counterclockwise rotation of Venus
B. the large size of Earth's Moon
C. the rings of Saturn
D. the extreme axis tilt of Uranus . Answer: C
◉ Where did the elements heavier than hydrogen and helium come
from?
, A. They were produced in the Big Bang
B. They evolved from hydrogen and helium shortly after the Big
Bang
C. They were produced inside stars
D. They were produced inside dense interstellar gas
E. all of the above . Answer: C
◉ Why did the solar nebula heat up as it collapsed?
A. Nuclear fusion occurring in the core of the proto-sun produced
energy that heated the nebula
B. As the cloud shrank, its gravitational potential energy was
converted to kinetic energy and then into thermal energy
C. Radiation from other nearby stars that had formed earlier heated
the nebula
D. The shock wave from a nearby supernova heated the gas
E. Collisions among planetesimals generated friction and heat .
Answer: B
◉ Why did the solar nebula flatten into a disk?
A. The interstellar cloud from which the solar nebula formed was
originally somewhat flat
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Which planet, other than Earth, has visible water ice on it?
A. Mercury
B. Venus
C. the Moon
D. Mars
E. Jupiter . Answer: D
◉ Which of the following is furthest from the Sun?
A. Pluto
B. an asteroid in the asteroid belt
C. Neptune
D. a comet in the Kuiper Belt
E. a comet in the Oort cloud . Answer: E
◉ Which planet does NOT have a ring system?
,A. Jupiter
B. Venus
C. Neptune
D. Uranus
E. Saturn . Answer: B
◉ Which of the following is NOT a characteristic of the inner
planets?
A. They are relatively smaller than the outer planets
B. They all have solid, rocky surfaces
C. Their orbits are relatively closely spaced
D. They all have substantial atmospheres
E. They have very few, if any, satellites . Answer: D
◉ Which of the following is NOT a characteristic of the outer
planets?
A. They have very few, if any, satellites
B. They are all large balls of gas
C. They are primarily made of hydrogen and helium
,D. Their orbits are separated by relatively large distances
E. They all have rings . Answer: A
◉ Where are most of the known asteroids found?
A. between the orbits of Mars and Jupiter
B. in the Kuiper Belt
C. in the Oort Cloud
D. between the orbits of the jovian planets
E. between the orbits if the terrestrial planets . Answer: A
◉ Which of the following is NOT an exception to the general patterns
of motion in the solar system?
A. the counterclockwise rotation of Venus
B. the large size of Earth's Moon
C. the rings of Saturn
D. the extreme axis tilt of Uranus . Answer: C
◉ Where did the elements heavier than hydrogen and helium come
from?
, A. They were produced in the Big Bang
B. They evolved from hydrogen and helium shortly after the Big
Bang
C. They were produced inside stars
D. They were produced inside dense interstellar gas
E. all of the above . Answer: C
◉ Why did the solar nebula heat up as it collapsed?
A. Nuclear fusion occurring in the core of the proto-sun produced
energy that heated the nebula
B. As the cloud shrank, its gravitational potential energy was
converted to kinetic energy and then into thermal energy
C. Radiation from other nearby stars that had formed earlier heated
the nebula
D. The shock wave from a nearby supernova heated the gas
E. Collisions among planetesimals generated friction and heat .
Answer: B
◉ Why did the solar nebula flatten into a disk?
A. The interstellar cloud from which the solar nebula formed was
originally somewhat flat
