SHAPES OF THIS LAND FROM A SCULPTURE'S HAND

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Across
  1. 2. Begins at the top of a mountain and empties in the sea
  2. 3. Low lying area between Hills and Mountains.
  3. 4. Piece of land completely surrounded by water.
  4. 5. Much taller than Hills
Down
  1. 1. Land that rises above but is below 300 meteres.
  2. 3. Vents in the earth's crust that erupt gas, lava or mud
  3. 5. Portion of ocean partly surrounded by land