Solar System Part 1: Question Preview (ID: 6174)

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What is the goal of comparative planetology?
a) to find which planets will be most suitable for future colonization
b) find out how our own solar system compares with extrasolar ones
c) to determine the origin and evolution of the solar system
d) to help plan future visits by unmanned probes, orbiters, and rovers

Most asteroids are found:
a) orbiting the jovian planets in captured, retrograde orbits.
b) between the orbits of Mars and Jupiter.
c) between the Earth and Sun.
d) in the orbit of Jupiter, but 60 degrees ahead or behind it.

The plane in which almost all planets orbit the sun is called the:
a) ecliptic.
b) equator of the solar system.
c) equant.
d) galactic plane.

Which statement about density is NOT correct?
a) All planets have densities greater than that of water, one gram/cm3.
b) Density is found by dividing the body's mass by its volume.
c) The denser planets orbit closer to the Sun.
d) The materials around us are less dense that those of the Earth as a whole.

Our best close-up views of the jovian moons came from the many passes by:
a) Voyager 2.
b) Global Surveyor.
c) New Horizons.
d) Galileo.

Which of the following are terrestrial planets?
a) Mercury, Venus, Earth, Moon, Mars, and Ceres
b) Mercury, Venus, Earth, Moon, Mars, and Pluto
c) the Earth, Moon, and Venus
d) Mercury, Venus, Earth, and Mars

A gravitational "sling-shot":
a) changes the speed and direction of a spacecraft nearing a massive planet.
b) causes comets to crash into planets, such as Jupiter in 1994.
c) explains how the solar system was formed after a near collision with another star.
d) allowed the Apollo astronauts to reach the Moon in 1969.

The solar nebula concept of planet formation around the protosun dates back to:
a) the discovery of extrasolar planets in 1995.
b) Galileo's notes about the moons of Jupiter.
c) Chamberlain's collision between the Sun and a passing star in 1945.
d) Descartes leftovers from star formation.

Which of the following is NOT a way that terrestrial and jovian planets differ?
a) Jovians have rings, terrestrials don't.
b) Jovian orbits are more eccentric than terrestrials, and farther off the ecliptic.
c) Jovians are less dense than any of the terrestrials.
d) Spinning rapidly, jovians are more oblate than solid terrestrials.

How do the densities of the jovian and terrestrial planets compare?
a) All terrestrials are more dense than any of the jovians.
b) More massive jovians all have high densities, compared to the tiny terrestrials.
c) Made from the same solar nebula, they are all similar.
d) The closer a planet lies to the Sun, the less its density.

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