Which of the following was NOT a problem earty Sumerians faced with their water supply? A. Lack of rain and hot sun often dried out the land,
B. They had two rivers they could get water from
C. Floods might come before they planted their crops.
D. The rivers often ran out of water.

Potentially, a large spill can be: a) an environmental threat, if it gets into drains b) a dangerous fire hazard c) harmful to individuals d) all of the above

The first national government for the united states was

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: