Anson's crossword puzzle

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Across
  1. 3. At night, the trains came back to the _______.
  2. 5. A word that has the same meaning as sodium chloride
  3. 6. The _____ slowly came into the station
  4. 8. The objects to form a new substance
  5. 9. Red _______ is a indicator
  6. 11. Is sulfur a element or compound?
  7. 14. _______ Is very acidic
  8. 15. We did a ___ today, it was very fun!
Down
  1. 1. pH ______ is 6, which is acid
  2. 2. The name for the new substance that is formed
  3. 4. There are so many ______ here, like a hundred steps!
  4. 5. In _______ class, we did a lab
  5. 7. The ___ is filled with ships and boats!
  6. 10. Something that is similar to a jar but in a scientific word.
  7. 12. The ____ fare is very expensive in Hong Kong, $27!
  8. 13. There are lots and lots of _______ waste in there!