The Everything Crossword

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Across
  1. 2. The closest planet to the Sun
  2. 6. The last letter of the Greek alphabet
  3. 7. The 2nd Most subscribed to YouTube channel of all time
  4. 8. The snack that —————— back
Down
  1. 1. Frozen water
  2. 3. The original name for Minecraft
  3. 4. The home planet of the Cybermen fro My Doctor Who
  4. 5. A synonym for cat