Buried Puzzle

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Across
  1. 2. used for writing
  2. 4. placed or hidden underground
  3. 7. somewhere that you learn things at
  4. 8. orbits the earth
Down
  1. 1. Beneath the surface
  2. 3. used for climbing
  3. 4. used to play with
  4. 5. unable to find ones way
  5. 6. Something that you read
  6. 7. largest planet in our system