Musical Letter V: What song "six weeks and I havent gotten over you yet"??

Questions

antarctica's residents are ---------- and support staffs who usually stay no more than a year at a time?

antarctica's residents are scientific and ---------- staffs who usually stay no more than a year at a time?

approximately 1/3 of the earth's land surface is----------?

at latitude ---------- degrees south you can sail all the way around the world?

australia is the richest source of mineral ---------- in the world?