1. Physik   geology   physics   geometry   history   Hint Half-n-half Clue   2. Geometrie   geometry   psychology   chemistry   zoology   Half-n-half Clue   3. Geologie   calculus   zoology   geometry   geology   Half-n-half Clue   4. Zoologie   chemistry   history   psychology   zoology   Half-n-half Clue   5. Astronomie   algebra   psychology   astronomy   calculus   Half-n-half Clue   6. Botanik   geography   geometry   zoology   botany   Half-n-half Clue   7. Geschichte   psychology   geography   history   philosophy   Half-n-half Clue