useless trivia: What Word Means: Smart - Well-informed?

Questions

A herd of sixty cows is capable of producing a ton of milk in less than a ----------?

A hibernating woodchuck breathes only ten times per hour. An ---------- woodchuck breathes 2,100 times an hour.?

A ---------- can open its mouth wide enough to accommodate a 4-foot-tall child.?

A hippopotamus can run faster than a ----------?

A hippopotamus has a stomach 10 feet long, capable of holding 6 bushels of ----------?