a region that forms the edge of a settled area

• frontier

• canal

• wagon train

• patent

• invention

a group of covered wagons that travels together for safety

• canal

• wagon train

• exclusion

• patent

waterways dug by people

• canal

• wagon train

• exclusion

• patent

• telegraph

something made for the first time

• invention

• equal rights

• exclusion

• patent

this gives a person the right to be the only one making or selling an invention

• patent

• exclusion

• reaper

• canal

means "keeping people out of a place"

• patent

• exclusion

• frontier

• transcontinental

the time when thousands of people came from around the world to search for gold

• frontier

• transcontinental

• gold rush

• wagon train

each worker only does one job

• assembly line

• equal rights

• patent

• exclusion

a machine that cuts grain

• reaper

• invention

• frontier

• patent

waterway that is dug by people

• canal

• telegraph

• transcontinental

• patent