Why are rivers and oceans both barriers and roadways? For each topic, describe how this concept comes
into play. Use specific examples where applicable, and general concepts as appropriate.
The New World — How was the ocean a barrier and roadway to discovery of the Americas? (5 points)
North America — List and describe a specific example of an ocean or river, and how it was a barrier
and/or roadway. (5 points)
Central and South America — List and describe a specific example of an ocean or river, and how it was
a barrier and/or roadway. (5 points)
Ocean-Centered Geogra

Question

Why are rivers and oceans both barriers and roadways? For each topic, describe how this concept comes 
into play. Use specific examples where applicable, and general concepts as appropriate. 
The New World — How was the ocean a barrier and roadway to discovery of the Americas? (5 points) 
North America — List and describe a specific example of an ocean or river, and how it was a barrier 
and/or roadway. (5 points)
Central and South America — List and describe a specific example of an ocean or river, and how it was 
a barrier and/or roadway. (5 points) 
Ocean-Centered Geogra