ethnicity is a social construct that is created by social groups and that must be defined and redefined as time passes and social contexts change. identify the works that have challenged american origin myths.

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The appalachian mountains rise to heights of about feet. 2,000 2,500 3,000 3,500

Which of these is an example of physical systems impacting the environment? a flood causes erosion and loss of shoreline. people fill a lake before building houses near it. an earthquake causes a building to fall. a native tribe considers a volcano to be sacred.