Cities generally considered to play an important role in the global economic system.
Spreading of urban developments on land near a city
The idea that continents were once together and have moved apart over time.
An area where one tectonic plate slides under another tectonic plate.
The "bubble" of icy objects surrounding our solary system is called?
Why do all of the planets appear to be on the same plane?
The judge is going to _______________ the prisoner to a life in prison for the crime.
Which item is the most "portable?"