How do oceanographers measure the salinity of ocean water?

What's the weather like where you live?

What could the united states of america do to improve their status? name at least 3(ap human geography)

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?