1. In the geocentric model (the Earth at the center
of the universe), which motion would occur?
(1) The Earth would revolve around the Sun.
(2) The Earth would rotate on its axis.
(3) The Moon would revolve around the Sun.
(4) The Sun would revolve around the Earth.
2. The diagram below represents the Earth's orbital
path around the Sun. The Earth takes the same
amount of time to move from A to B as from C
Which values are equal within the system?
(1) The shaded sections of the diagram are equal
(2) The distance from the Sun to the Earth is the
same at point A and at point D.
(3) The orbital velocity of the Earth at point A
equals its orbital velocity at point C.
(4) The gravitational force between the Earth
and the Sun at point B is the same as the
gravitational force at point D.
3. Which statement best describes galaxies?
(1) They are similar in size to the solar system.
(2) They contain only one star but hundreds of
(3) They may contain a few hundred stars in a
space slightly larger than the solar system.
(4) They may contain billions of stars in a space
much larger than our solar system.
4. The diagram below represents the elliptical orbit
of the Earth around the Sun.
Which equation should be used to find the
eccentricity of the Earth's orbit?
(1) eccentricity =299,000,000 km
(2) eccentricity = 5,000,000 km
(3) eccentricity = 299,000,000 km - 5,000,000
(4) eccentricity =
299,000,000 km - 5,000,000 km
5. According to the big bang theory, the universe
began as an explosion and is still expanding.
This theory is supported by observations that the
stellar spectra of distant galaxies show a
(1) concentration in the yellow portion of the
(2) concentration in the green portion of the
(3) shift toward the blue end of the spectrum
(4) shift toward the red end of the spectrum
6. According to Hubbell’s law more rapidly
moving galaxies are now
(1) further away from us
(2) closer to us
(3) accelerating rapidly
(4) already contracting toward another big bang