Which describes a major challenge facing the builders of the transcontinental railroad?

A.

tunneling under Lake Erie

B.

crossing the Sierra Nevada mountains

C.

spanning the Grand Canyon

D.

bridging the Rio Grande River

The senate can exercise influence over foreign policy through its power to

What evidence show that the Maya had prior knowledge of astronomy?

The United states acquired Florida from Spain in which treaty A) Adam-Onis B) Jay's Treaty C) Franco-American D) Entente Cordiale

What ocean currents follow regular patterns?

If you don't know don't comment if your not sure don't comment During the Revolutionary War, many states had their own forms of money. True False

Using the wall map, identify which is the largest U. S. territory in the Caribbean, an island acquired from Spain after the Spanish-American War? A. Puerto Rico B. the Virgin Islands C. Navassa Island D. American Samoa

How did the Manhattan project improve American military technology?

Which event that occurred between 1763 and 1776 was the most significant cause of the American Revolution?

How did the 13th, 14th, and 15th amendments strength the republican party in the south?

A recession in 1937 supported whom in regards to the New Deal's success?