GENERAL KNOWLEDGE: As what is pyrites commonly known?

Questions

this german admiral (of which a battleship was later named) is famous for organizing and planning the ww1 submarine blockade of the british isles?

what four-time national league batting champ was killed in a plane crash in 1972?

what city holds the warana festival every spring?

polyp, fish, worm, plant, crab, mollusk, and plankton in symbiotic relationship, make up what?

which position is not named in abbott and costello's 'who's on first' routine?