Given the fact that:  The more carbon atoms a hydrocarbon has, the greater the number of isomers.  Answer the question:   If Jim is comparing hydrocarbons and he finds one that has more carbon atoms, the number of isomers that hydrocarbon contains is greater or smaller?
greater

Given the fact that:  Because these isotopes decay more slowly, they can be used to date much older specimens.  Answer the question:   For dating the age of a fossil, and compared to the isotope Carbon 14 with its 5730 year half-life, would Francium with a 22 minute half-life be a less useful isotope? or more useful isotope?
less useful isotope?

Given the fact that:  So the higher an object is above a surface, the more potential energy it has.  Answer the question:   A ball that is on the top of the empire state building about to be dropped off will have more or less potential energy than a ball on the ground?
more