Spelling assignment crossword

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Across
  1. 4. the earths internal heat
  2. 6. an area of land
  3. 8. increased fourfold
  4. 9. to break into something
  5. 10. to break in suddenly
  6. 13. muscle at front of thigh divided into 4 sections
  7. 15. a place for holding land animals
  8. 16. hollow rock (earth) lined with crystals
  9. 17. to measure earth (angles, sides, ect.)
  10. 19. land
Down
  1. 1. 4 sided figure
  2. 2. to explode or burst open
  3. 3. for your money to be broken apart (not have money)
  4. 5. to draw the earth; study of physical features of earth
  5. 7. one of 4 equal sections
  6. 11. to negatively break into something
  7. 12. to frighten or cause fear in a land
  8. 13. an area of land with 4 sides
  9. 14. the study of the earth and how land was formed
  10. 18. a raised, flat mound of land