PUNCTUATION MATTERS!

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Across
  1. 5. Marks the end of an exclamatory or imperative sentence
  2. 8. Separates two clauses or sentences and is weaker than a fullstop Help add extra (non-essential) information
  3. 10. Enclose information, help clarify text, separate mathematical concepts
  4. 12. Joins words or parts of words together
Down
  1. 1. Marks the end of a declarative sentence
  2. 2. Marks a possessive or missing letters
  3. 3. Help add extra (non-essential) information
  4. 4. Introduces a list or an explanation
  5. 6. Can be used in place of commas, parantheses or colons
  6. 7. Indicates a break within a sentence, making it easier to read
  7. 9. Marks the end of an interrogative sentence
  8. 11. Creates suspense