Afirmative vs Negative sentences

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Across
  1. 4. Are not citizens of this country.
  2. 8. Is the gaseous layer which evolves the earth.
  3. 9. Is the third planet in the solar system.
  4. 10. Are not truths.
Down
  1. 1. Are the minimal units of the mater.
  2. 2. Are the only mammals who can fly.
  3. 3. Person who is not guilty.
  4. 5. Is the capital of Mexico.
  5. 6. Is not the night.
  6. 7. Are not masculine.