True or false: the total population of a country must be known to determine the population density of a square mile or kilometer. true, population density is a measure of how an entire population is distributed. true, population density and total population are the same. false, population density cannot be measured in square miles or square kilometers. false, only the total number of people living in the square mile needs to be known.

(A. )   True, population density is a measure of how an entire population is distributed.

The total population of a country must be known to determine the population density of a square mile or kilometer.  Population density can be found by dividing the number of people by land area [measured in square miles or square kilometers].

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.