The sumerians of mesopotamia were the earliest known civilization. they have been given credit for inventing the cart, the wagon, the chariot, and a new type of pottery. all these inventions are related to which general invention?

Jamie is conducting a study of hyperactive children. he recruits two children identified by teachers as hyperactive and takes a detailed history by interviewing the child and the child's parents over a period of several days, looking for patterns in the child's early experiences that may have contributed to the child's hyperactivity. jamie's research plan is referred to as the