1. álgebra   botany   astronomy   trigonometry   algebra   Hint Half-n-half Clue   2. história   geography   chemistry   philosophy   history   Half-n-half Clue   3. astronomia   zoology   calculus   astronomy   philosophy   Half-n-half Clue   4. biologia   zoology   algebra   biology   geology   Half-n-half Clue   5. botânica   history   botany   philosophy   chemistry   Half-n-half Clue   6. química   biology   chemistry   geography   astronomy   Half-n-half Clue   7. geologia   algebra   philosophy   trigonometry   geology   Half-n-half Clue