The smart/worthless crossword

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Across
  1. 1. most viewed youtube video (2022).
  2. 4. ocean creature worse than sharks.
  3. 6. what creates oxygen.
  4. 8. what does grim mean.
  5. 9. which is more liked star trek or star wars.
  6. 10. where dolphins live.
Down
  1. 2. where we go to study.
  2. 3. the owner of space X.
  3. 5. the asian sign of good luck.
  4. 7. what we expel after breathing (periodictable)