1. Chemie   astronomy   trigonometry   physics   chemistry   Hint Half-n-half Clue   2. Geologie   philosophy   trigonometry   geology   calculus   Half-n-half Clue   3. Botanik   geology   botany   astronomy   philosophy   Half-n-half Clue   4. Trigonometrie   trigonometry   botany   zoology   psychology   Half-n-half Clue   5. Geometrie   zoology   algebra   psychology   geometry   Half-n-half Clue   6. Geschichte   biology   history   trigonometry   physics   Half-n-half Clue   7. Erdkunde   philosophy   geography   trigonometry   zoology   Half-n-half Clue