What is the lowest layer of the earth's atmosphere? thermosphere?

How does population distribution reflect a particular region’s economy?

What factors did the founders of your state use to determine the states boundaries ? did you states founders choose boundaries based on physical features or lines longitude and latitude ?

Why are all maps distorted? when reading a map, why is it important to check the legend? what is the difference between longitude and latitude? identify the meridian at 0° longitude and the parallel at 0° latitude.