Crossword Puzzle

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Across
  1. 3. – A substance that cannot be broken down further.
  2. 6. – The smallest unit of a chemical compound.
  3. 8. – A device used to see very small objects.
  4. 9. – A place where experiments are conducted.
Down
  1. 1. – The study of DNA and heredity.
  2. 2. – Related to atoms, the building blocks of matter.
  3. 3. – A test or procedure to discover something new.
  4. 4. – A process where substances change into new substances.
  5. 5. – A combination of symbols that represent a compound.
  6. 7. – A negatively charged particle in an atom.