Crossword puzzle

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Across
  1. 3. - outer solid part of the planet.
  2. 5. - scientific study of landforms and the process that shapes them.
  3. 6. - is almost similar to mesa
  4. 7. - the largest layer of the earth.
  5. 9. - flat and broad land areas.
  6. 10. - Latin word which means "almost island"
Down
  1. 1. - study of the current terrain features of a region.
  2. 2. - flat-topped mountains.
  3. 4. - is the study of the flow of matter primarily in the liquid state.
  4. 8. - deep ravine between cliffs