Crossword Puzzle Levels 1&2
Navigation Channels - Our Underwater Highways

Across
1. The ground above the floodplain that is not covered by water.
2. Maps of rivers, harbors, and oceans that contain information necessary for the safe navigation of ships.
3. A river or channel on which boats, barges, and ships can travel.
4. A man-made waterway.

Down
1. A man-made waterway that connects the Tennessee River to the Tombigbee River and is a shortcut for boats and barges that use those two rivers.
2. Travel by ship, aircraft, or other vehicles using maps.
3. A person who is employed to steer a boat or ship through a particular river or channel.
4. Soil that is carried into oceans, lakes, streams, and rivers and settles to the bottom.
5. A buildup of sediment deposits on the river or ocean bottom.
6. The washing away of land and soil by action of wind and water.