US PhysicalVersion en ligne Select the correct land form on the map. par Steve Proctor 1 Columbia R. 2 Hudson R. 3 Mississippi R. 4 Lake Superior 5 James R. 6 Potomac R 7 Lake Michigan 8 Lake Huron 9 Rio Grande 10 Missouri R. 11 Ohio R. 12 Lake Ontario 13 Lake Erie 14 Chesapeake Bay 15 Cape Cod 16 Great Salt Lake 17 Great Plains 18 Appalachian Mtns. 19 Rocky Mtns. 20 Cumberland Gap 21 Cascades 22 Piedmont