1. trigonometria   trigonometry   zoology   history   philosophy   Hint Half-n-half Clue   2. biologia   biology   history   geometry   chemistry   Half-n-half Clue   3. geografia   algebra   geography   chemistry   astronomy   Half-n-half Clue   4. geologia   philosophy   trigonometry   botany   geology   Half-n-half Clue   5. chimica   chemistry   geology   algebra   trigonometry   Half-n-half Clue   6. botanica   chemistry   botany   calculus   history   Half-n-half Clue   7. filosofia   botany   astronomy   philosophy   physics   Half-n-half Clue