The Mercalli scale rates the intensity of which natural events from I to XII?

Which South American water boa is the world's heaviest snake, with some reports claiming lengths of more than 30 feet? Which wood, the lightest used commercially, is used to build model airplanes and some kinds of buoys? The finely divided underwater leaves of water milfoil are especially suited to absorbing which gas? The lutz, a jump named for Austrian skater Alois Lutz, is performed in which sport? In Longfellow's epic poem, Minnehaha is the beloved of which hero? Which university's mission statement has highlighted its location in Indianapolis, "one of America's most livable citie… Modern racing of which dogs took off in the early 1900s with mechanical lures such as a stuffed rabbit skin pulled arou… X-Acto is probably the best-known brand of which precision tool used by artists and model makers?