Review the map showing the population density of medieval Europe around 1300. An untitled map of Europe. A key shows populations of 1,000 to 70,000 and 70,000 to 210,000.

Review the map showing the population density of Europe today.

An untitled map of Europe. A key shows populations of 500,000 to 1,000,000, 1,000,001 to 5,000,000, and More than 5,000,000.

According to the maps, what happened to the population density of Europe from medieval times to today?

It stayed the same.
It decreased.
It increased.
It disappeared.

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.