What led to the decline of the sumerian city-states? a. a brutal civil war among sumerians b. poor farming practices c. a lack of qualities that would make them a true civilization d. they were weakened by attacks from outside groups, such as the akkadians.

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.

The second westward surge reached the: mississippi river, appalachian mountains, oregon territory

What word means having a variety of cultures in the same area? a. cultural diversity b. culture region c. popular culture d. population density