A formal region is based upon a central cultural node
common or shared perceptions about a region
physical boundaries
the characteristics that dominate the region
a state's definition of region

The earth's internal process which drives seafloor spreading is

Where does the availability of water pose the greatest problem

The specific heat of the three substances in the image are given in the table. stamped concrete: 0.75, grass covered soil: 1.01, water: 4.18. place the areas in order based on how fast they’ll heat up on a sunny afternoon. start with the fastest and end with the slowest.