How did completion of the first transcontinental railroad in 1869 encourage settlement of the american west

Pl did european countries want to find a shorter route to the far east? a. costs would be lower. b. they could take more trips. c. the route they used was rough and dangerous. d. sailors did not want to be away from home so long.

During world war 2 mexican workers came to the united states as part of the

Match each model with its name and the name of the scientist who created it.