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