The West, The North, and The South.
If you look at a map under the title sectionalism, you can see just how American's sectionalized the United States. The West was typically the area in which Manifest Destiny aimed to conquer while the South and North were divided by slavery.
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A hypothesis must be testable in order to be termed a scientific hypothesis.
A hypothesis is almost a theory in that it needs to be tested in order to become a true scientific hypothesis. These tests have to be the same every time, meaning that the hypothesis has to yield the same results each time it is tested.
The change in inner ears and auditory nerves