Know the key terms on pp. Geographers study space the way historians study time. Geography draws from many disciplines, but the spatial viewpoint is what makes geography unique. Maps are the tools of geographers use, they are not means unto themselves.
Diffusion is the spread of ideas to other areas.
For example, the Southern Baptist Church began in the South, now it is found in many other countries. In the same manner, cattle were once found only in the Middle East. Today they are found over large parts of the world. Coffee was once grown and consumed only in Ethiopia, today much of the world drinks it. Mental maps are fascinating.