Seeing how every person could learn different or does learn different from other people, the identical twins would seem to have similar iq scores because they share the same amount of physical features and also some mental features. Being raised together or apart don't play a huge roll in learning depending on if they where taught together or not.
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The Spanish contact affected mainly due to the fact they wanted to convert American Indians into Christianity, even though Spanish manage to create bonds (marriage) with the Natives, it was not a good relationship for everyone. Compared to the French that had a friendlier approach with the Indians. Overall Spain tried to find a balance between being strict but still remaining passive with the Native.
With the settlement of ships along the Barrier Islands, Spain began missions in order to continue promoting Christianity.
Hernando de Soto started conquering South America and made his way up north, in which he brought ships to Florida, South Carolina and even reached the Mississippi River. His main objective was to find gold.
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Not only did the Erie Canal open the American interior to increased trade, commerce, and settlement. It also became an "information superhighway" for new ideas. Hopefully this helps!