1. trigonometria   trigonometry   botany   calculus   chemistry   Hint Half-n-half Clue   2. zoologia   chemistry   geography   zoology   astronomy   Half-n-half Clue   3. álgebra   chemistry   psychology   trigonometry   algebra   Half-n-half Clue   4. astronomia   history   astronomy   biology   geometry   Half-n-half Clue   5. biologia   biology   algebra   physics   zoology   Half-n-half Clue   6. geometria   geometry   astronomy   geology   calculus   Half-n-half Clue   7. botânica   astronomy   calculus   botany   algebra   Half-n-half Clue