curtis's schoolwork crossword

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Across
  1. 4. Jake the dog and Finn the blank---
  2. 5. A kid with blond hair
  3. 7. the universe is made up of?
  4. 8. warheads are blank--
Down
  1. 1. who's crossword is this?
  2. 2. A thin white material
  3. 3. A red flower
  4. 6. most annoying person from diary of a wimpy kid.