What was the stamp act? a. a British law against charging colonists for postal service
b. a means of making colonial post offices profitable
c. a tax the British imposed on the colonies to help pay off their debt
d. a British restriction on colonists moving west

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

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.

Which statements explain reasons why unconformities occur? check all that apply. rocks along a fault break and move. igneous rock forms at earth’s surface. rocks erode and sediment is deposited. no sediment is deposited over a long time. igneous rock forms between sedimentary layers.