Dune Sandworm puzzle

123456
Across
  1. 3. the sandworms help create this
  2. 4. what sandworms start as
  3. 5. the planet where sandworms live
Down
  1. 1. sandworms are at the top of this
  2. 2. what the spice is used for
  3. 4. The Fremen see sandworms as
  4. 6. Sandworms are a symbol