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