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