Given its lack of large rivers and arable floodplains, ancient Mesoamericans created societies of remarkable size and social sophistication. Which was NOT an example of
major social or
technological achievement in the region?
1) Olmec sculpture
2) Aztec monumental architecture
O 3) Toltec wheeled vehicles
4) Mayan astronomy and mathematics

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.

What was the name of the theory that said that if one country in a region fell to communism, others would surely follow? 1) domino theory 2) arms race 3) brinkmanship 4) containment theory

The appalachian mountains rise to heights of about feet. 2,000 2,500 3,000 3,500