14. What is compression? 15a. In the past, most interaction between places required what? p. 36 15b. How has this changed? 16. Give some examples of things that retard interaction among groups. 17. Describe the phenomenon known as distance-decay. 18. is defined as the process by which a characteristic spreads across space. With Diffusion regard to diffusion, define and, where possible, give an example of each of the following: D I F F U S I O N hearth relocation diffusion n hierarchical o i diffusion s u f f i d contagious diffusion n o i s n a p stimulus diffusion x E
14. What is compression? 15a. In the past, most interaction between places required what? p. 36 15b. How has this changed? 16. Give some examples of things that retard interaction among groups. 17. Describe the phenomenon known as distance-decay. 18. Diffusion is defined as the process by which a characteristic spreads across space. With regard to diffusion, define and, where possible, give an example of each of the following: D I F F U S I O N hearth relocation diffusion E x p a n s i o n d i f f u s i o n hierarchical diffusion contagious diffusion stimulus diffusion