crossword 1

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Across
  1. 2. A city in central Germany
  2. 4. (solution) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
  3. 6. Monetary unit in the Netherlands
  4. 8. Tufted perennial wood aster of North America; naturalized in Europe
  5. 9. Shaped in the form of the letter V
Down
  1. 1. Found in Atlantic coastal waters of North America from South Carolina to Maine; esteemed as a panfish
  2. 3. (computing) a circular button that you can click on to select one item from a set of mutually exclusive options
  3. 5. Of lesser quality than second-rate
  4. 7. A pause from doing something (as work)