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