Landform Riddles

1234567
Across
  1. 1. A large sheet of ice in the ocean. I am what sunk the Titanic
  2. 4. A place on the shore where boats can safely anchor
  3. 6. Where there is a supply of water in the des
  4. 7. A ring of island in the ocean
Down
  1. 2. A man-made irrigation and navigation water system
  2. 3. a landform that is hilly and at the base of a mountain range
  3. 5. a part of a river and it is also on your face