Oliver’s crossword puzzle

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Across
  1. 1. To clap
  2. 4. People that work in laboratories
  3. 6. A badly behaved person
  4. 7. A kind or sort
  5. 8. A person that writes a book
Down
  1. 1. A name for a really old person
  2. 2. Chemistry is part of this subject
  3. 3. Goes to space
  4. 5. People that watches a play