Which river formed the grand canyon?
a.

the columbia
b.

the colorado
c.

the rio grande
d.

the mississippi

Each of the following countries was part of the big four at the paris peace conference except a. russia b. italy c. germany d. britain

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

The soviet union and the united states believed in two very different economic systems. what were the names of each?