Why did the American colonies develop a separate culture from Great Britain during the era of colonization?

American colonies, also called thirteen colonies or colonial America, the 13 British colonies that were established during the 17th and early 18th centuries in what is now a part of the eastern United States. The colonies grew both geographically along the Atlantic coast and westward and numerically to 13 from the time of their founding to the American Revolution (1775-81). Their settlements had spread far beyond the Appalachians and extended from Maine in the north to the Altamaha River in Georgia when the Revolution began, and there were at that time about 2.5 million American colonists.

English colonies in 17th-century North America