Super and Auto Prefix Crossword

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Across
  1. 2. take the place of
  2. 3. greater than the speed of sound
  3. 4. done without thinking about it
  4. 5. a car
  5. 6. things that cannot be explained by science
  6. 7. a ​device that ​keeps ​aircraft, ​spacecraft, and ​ships ​moving in a ​particular ​direction
  7. 8. a star that has exploded
  8. 9. watch and direct
Down
  1. 1. the signature of a famous person
  2. 2. a country with great power
  3. 3. a large self-service grocery
  4. 5. a ​book about a person's ​life, written by that ​person
  5. 6. place on top of
  6. 8. a man with greater abilities than others