Some rock layers are incomplete. the gaps are called what?

How did the environment influence settlement patterns in colonial america? * 1 point a. early settlers stayed near rivers for farmland and transportation b. early settlers stayed in hilly areas to avoid frequent floods in coastal areas c.early settlers quickly moved to the mountains to avoid hot summers d. early settlers only lived on coastal islands to prevent indian attacks

How do hearths affect cultural diffusion? a. a hearth is the destination of cultural diffusion. b. a hearth divides a cultural region in two. c. a hearth is the beginning point of cultural diffusion. d. a hearth is the means of cultural diffusion. e. a hearth is the meeting point of two diffuse cultures.

Which water sources contribute to a river system? check all that apply. groundwater lakes rivers streams watersheds