A future news release might report that a new planet has been found around a star very similar to our Sun. The system contains other planets as well like our solar system. This newly discovered planet is claimed to have a mass 40 times that of Earth and is located nearly 25 AU from the star it orbits. Which of the following would be a reasonable prediction about this planet, assuming it formed like our solar system? I. The planet will probably have a mean density of around 5 g/cm3. II. The planet will probably have a radius of around five to ten times greater than Earth's. III. The planet will probably have several satellites. IV. The planet will probably have a composition that is mostly hydrogen and helium.
a. I & IV
b. I, II, & III
c. II, III, & IV
d. I, II, & IV
e. I, II, III, & IV
Question 2
Which one of the following IS NOT a characteristic of terrestrial planets?
a. low average density
b. orbits inside the asteroids
c. craters in old surfaces
d. small diameters
e. very few satellites
Examples of deep-sea corals found in the Sable Gully, 200 km off the coast of Nova Scotia.
Dwarf Planet Eris
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Looking to the Future
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