Puzzle 73

12345678910
Across
  1. 3. Low areas between hills
  2. 4. Low hills at mountain base
  3. 5. Long narrow raised land
  4. 8. Natural scenery vistas
  5. 9. Open grassy fields
  6. 10. High rocky landforms
Down
  1. 1. Deep narrow valleys
  2. 2. Sloping ground on a hill
  3. 6. Slow moving ice masses
  4. 7. Flat elevated land