largest continent is Asia the smallest is Australia
Australia. (not Africa as some mistakenly believe)
Greece is a country on the European Continent, and the continent closest to it is Asia
Er... it depends I think. But probably Antarctica because it is cold or Africa because its hot? Duh
"On a continent" is correct because a continent is a land mass. However, you would say "in a country", "in a province", "in a county", "in a city", etc. That's because the boundaries of these places...