1. filosofía   psychology   philosophy   geology   chemistry   Hint Half-n-half Clue   2. geología   algebra   geography   geology   trigonometry   Half-n-half Clue   3. historia   psychology   history   geography   algebra   Half-n-half Clue   4. trigonometría   geology   chemistry   geography   trigonometry   Half-n-half Clue   5. astronomía   geography   zoology   astronomy   botany   Half-n-half Clue   6. física   botany   chemistry   biology   physics   Half-n-half Clue   7. geometría   philosophy   geometry   chemistry   trigonometry   Half-n-half Clue