Astronomy 10 Quiz 3, Fall Semester 2007
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q3.4
[3.0 points.] Which one of the following choices best explains what the Foucault pendulum demonstrates in order to disprove geocentrism and/or prove heliocentrism?
(A) The Earth spins on an axis.
(B) Kepler's laws must be true.
(C) Circular epicycles cannot accurately predict positions of the planets.
(D) The Earth has an oblate (squashed) shape.
(E) The Earth is orbiting the Sun.
Correct answer: (A)
The direction of a Foucault pendulum's swing will remain stationary while the Earth rotates with respect to it, providing evidence that the Earth rotates on its own axis.
Student responses
Section 0135
(A) : 11 students
(B) : 4 students
(C) : 7 students
(D) : 1 student
(E) : 14 students
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