How could the continent have gotten so far apart, and about how long it take for this to happen?

Suggest two reasons why irrigation is important for human development of the desert

Rah is completing a school project on the expansion of fast food restaurants across the united states. she finds a map that shows a clear pattern of restaurants beginning in the east and expanding west. this map was most likely created using the technology of

What is the border between layers a through f and layer g called?