African Americans also played a prominent role in the American Civil War. Over 200,000

African Americans, equaling 10% of the entire military force, served in the Union military.

37,000 died fighting for the Union. Most were escaped slaves who served in segregated

units under white officers. What similarities or differences do you see between the African-

American soldiers in the Civil War and World War II? In your opinion, what motivated them?

a. competition between france and england for land and power

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse