I think it was Alexander Graham Bell
People think the earth is flat because it seems hard to fathom that you can still stay on the earth if you're on the North Pole. This theory, that the earth is flat, was well known for hundreds of years. The vikings were the first to figure out that the earth is not flat, though Christopher Columbus gets the credit.
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Answer:
observable
Explanation:
In order for an experiment to succesfully take place, the experiment must be controlated, observable, and repeatable, this means that under certain circumstances that you are able to control, you can observe an event and investigate it. It has to be observable in order to gain and gather information about the event and with this be able to come up with a conclusion of factor that make it possible and the consequences that the given event has.
Answer:
Some geographical features was the Tigris and Euphrates river. Without this they would not have good soil. This led to their food surplus.
Explanation:
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