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