What did railroads contribute to the development of the west? Pls Help! Soical studies is my worst subject ever! Thanks if you can help!

Answer 1

http://middle.usm.k12.wi.us/faculty/taft/unit5/westwebquest/transcontinental/index.htm

http://en.wikipedia.org/wiki/First_Transcontinental_Railroad

http://tdl.org/txlor-dspace/bitstream/handle/2249.3/174/03_rlrds_west.htm?sequence=6