Crossword puzzle

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Across
  1. 7. The hard rocky part of the earth
  2. 8. Visual representation of world on a piece of paper
  3. 9. Imaginary line dividing the earth into two parts
  4. 10. A huge body of salty water
  5. 11. Breaking of earth's material
  6. 12. Fresh Water bodies on the surface of the earth
Down
  1. 1. Mixture of gases surrounding the earth
  2. 2. A flat piece of elevated land
  3. 3. Moving pieces of earth's crust
  4. 4. Breaking and removal of earth's material.
  5. 5. Magma erupting from within the crust
  6. 6. Surface of the earth covered by water