A physical and a political map

Investigate: What is the difference between a physical and a political map?
Locate this physical map of the United States and examine it carefully, making note of the mountain ranges, rivers, lakes, and deserts.
http://www.freeworldmaps.net/northamerica/united-states/map.html
Look at the Map “Native Peoples” (c 1500)
http://www.pasleybrothers.com/mocourses/history3/images/indians.jpg
Click on the map to enlarge it until it fills your screen
Study the map and carefully note the Cultural Groups and Trade Routes.
Answer the following questions:
According to the map, which of the cultural groups would have engaged in agriculture?
Did most trade routes run North/South or East/West? What is the most plausible explanation for this?
On the eve of European contact, Native American tribes spread across the North American continent and encompassed a range of different cultures, languages, and religious beliefs. Trade goods exchanged among these diverse groups furnished avenues of communication across the continent. According to this map, which geographic features presented barriers to trade? Which geographic features would have facilitated trade?