The basic unit of study in geography. A region is an area that has certain unifying characteristics such as climate, language, or history.
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0 Votes. Pentane is an organic compound. It is component of some fuels and is added as an solvent in fuel production. Due to the fact that it is inexpensive and has a low boiling point it is used in refrigerant blends as well. In addition to that it is the primary blowing agent in the production of polystyrene foam.