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an air mass exist in the middle upper part of the United States what type of air mass is this and what are its main characteristics choose all that apply

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alyssariccione342

Answer:

Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the the underlying surface properties where they originate. ... Upon movement, air masses displace residual air over locations thus changing temperature and humidity characteristics.

Explanation:
Mass exists because we are living in a world full of a lot of weird things and we love it