1. álgebra   algebra   botany   geography   philosophy   Hint Half-n-half Clue   2. biologia   geography   biology   astronomy   history   Half-n-half Clue   3. cálculo   history   astronomy   botany   calculus   Half-n-half Clue   4. psicologia   psychology   history   chemistry   astronomy   Half-n-half Clue   5. física   botany   physics   geology   zoology   Half-n-half Clue   6. astronomia   algebra   astronomy   geology   botany   Half-n-half Clue   7. botânica   philosophy   zoology   trigonometry   botany   Half-n-half Clue