1. zoologia   chemistry   zoology   algebra   philosophy   Hint Half-n-half Clue   2. química   chemistry   calculus   geology   geometry   Half-n-half Clue   3. geologia   geology   algebra   history   philosophy   Half-n-half Clue   4. álgebra   botany   algebra   astronomy   chemistry   Half-n-half Clue   5. geografia   geography   trigonometry   calculus   psychology   Half-n-half Clue   6. cálculo   geology   calculus   geography   biology   Half-n-half Clue   7. filosofia   calculus   trigonometry   philosophy   zoology   Half-n-half Clue