Remittances Money migrants send back, money migrant send back to family and friends in their home countries, often in cash, forming an important part of the economy in many poorer countries. Cyclic Movements Movement that has a closed route and is repeated annually or seasonally. Activity Spaces The space within which daily activity occurs. Nomadism Movement among a definite set of places. Periodic Movements Movement that involves temporary, recurrent relocation Migrant Labor A common type of periodic movement involving millions of worker in the US and tens of millions of workers worldwide who cross international borders in search of employment and become immigrants, in many instances. Transhumance