Space Cadets

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Across
  1. 4. a special form or variant of something
  2. 5. existing everywhere, for all purposes
  3. 7. a large, strongly built boat or ship used for carrying freight or waste
  4. 8. melted
Down
  1. 1. rock containing a metal
  2. 2. imaginary creatures from outer space
  3. 3. friendly
  4. 6. to keep yourself from doing something