1. biologia   astronomy   physics   algebra   biology   Hint Half-n-half Clue   2. botanica   botany   astronomy   chemistry   history   Half-n-half Clue   3. psicologia   astronomy   chemistry   psychology   algebra   Half-n-half Clue   4. astronomia   psychology   geography   astronomy   calculus   Half-n-half Clue   5. calcolo   philosophy   calculus   geometry   chemistry   Half-n-half Clue   6. storia   botany   physics   philosophy   history   Half-n-half Clue   7. chimica   geometry   philosophy   chemistry   geology   Half-n-half Clue