Answer:
A Third
Explanation:
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The correct answer: Dakota and Ojibwa
The tribes of the Dakota before European contact in the 1600's lived in the area around Lake Superior. In this timberland condition they lived by chasing, angling and assembling wild rice. They additionally developed some corn yet their area was close to the furthest reaches of where corn could be developed.
They battled with the Ojibwa (Chippewa) tribes for control of their locale. They Ojibwa acquired firearms from the French in the early piece of the eighteenth century and the Dakota tribes were headed to the territory instantly west of Lake Michigan and south of Lake Superior in what is currently Minnesota. A portion of the Dakotas started moving west into the Great Plains district. The Dakota tribes are regularly alluded to by the name Sioux. This depends on the name given to them by their foes the Objibwa. Sioux is a French debasement of the Objibwa word Nadoussioux which implied Adder snakes and in this way foe.
The names utilized by the Dakotas themselves for the different tribal vernacular gatherings were Dakota, Nakota and Lakota. The outcast names for these three gatherings were Santee, Wiciyela and Teton. In the Santee vernacular the word dakota implied partners.
At the point when the Lakotas left the Minnesota territory they embraced a more traveling life in light of steeds, teepees and chasing bison rather than bark houses and assembling wild rice. The Lakotas however did likewise take control of the Black Hills. The Santee or Dakota tribes were all the while living in the Minnesota amidst the nineteenth century. An uprising by the Santees brought about thrashing by the U.S. Armed force. A portion of the surviving Santee fled to Canada, others were set in reservations in Nebraska by the U.S. Armed force.
The Lakota or Tetons, who had changed themselves from an inactive timberland individuals into meandering wild ox seekers. The Lakota battled in the U.S. Armed force in what are known as the Sioux Wars, 1866-68 and 1876-77. It was the Lakota who wiped out General George Custer unit in 1876 at the Battle of the Little Big Horn in Montana. After the Lakota were quelled they were settled in reservations in North and South Dakota and somewhere else.
Answer: Twentieth century.
Plate tectonics is a scientific theory that describes the movement of plates of the Earth’s lithosphere. The model builds on the concept of continental drift, which proposed that continents had “drifted” relative to each other across the ocean bed. The speculation was first put forward by Abraham Ortelius in 1596. The concept was developed independently by Alfred Wegener in 1912, but the theory was generally rejected.
It was only with the discovery of mid-oceanic ridges in 1947 that the theory began acquiring evidence. Scientists also used devices developed during WWII to study odd magnetic variations across the ocean floor. By 1967, plate tectonics were fully accepted in modern geophysics.
