westward expansion

Edit Answers
123456789
Across
  1. 4. a 363-mile river
  2. 5. a way to move boats up and down rivers
  3. 8. a boat that uses a 9
  4. 9. a train that uses a 9
Down
  1. 1. an invention that uses steam
  2. 2. a raft
  3. 3. the inventor of 7
  4. 6. a manmade river
  5. 7. the inventor of 1