Which agency represents a cooperative effort of the Department of the Interior and the Department of Agriculture and is a central supply point for resources required on large wildland firefighting incidents?

National Interagency Fire Center(NIFC).

Explanation:

This is a   Federal agency,  which  is a subsidiary of National fire and aviation executive board, created to implement the policy of federal Wildland  management  Act policy.  Its is located within the  Boise airport in the state of Idaho, to serve as operational base  for  National Interagency Coordination Center  and National Multi-Agency Coordination group.

Its primary purpose is to  serve as  the base for supply of all the needed resources for  incidents related to wildland firefighting.But this has been extended to  cater for  emergency needs for other natural disasters; floods., hurricanes, etc.

chemical weathering

explanation:

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt