Cuesta College, San Luis Obispo, CA
Refer below to the minimal qualifications established by the International Astronomical Union for a planet:
I. Orbits the sun.Achilles is described as an irregularly-shaped object that shares Jupiter's orbit, always leading Jupiter as they both orbit the sun[*]. According to the IAU qualifications, Achilles is classified as:
II. Shape "rounded-out" by gravity.
III. Cleared/dominates orbit around sun.
(A) a moon.
(B) solar system debris.
(C) a dwarf planet.
(D) a planet.
(E) (None of the above choices.)
Correct answer (highlight to unhide): (B)
Achilles directly orbits the sun (meeting qualification I), but its shape is not "rounded out," and because it fails qualification II, Achilles is categorized as solar system debris.
Exam code: quiz04nG4N
(A) : 1 student
(B) : 15 students
(C) : 1 student
(D) : 0 students
(E) : 2 students
Success level: 80% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.40
Exam code: quiz04stP7
(A) : 7 students
(B) : 29 students
(C) : 9 students
(D) : 1 student
(E) : 3 students
Success level: 62% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.33