He resigned because he'd already had enough trouble as president. Mainly the Watergate scandal. His plan was for him to step down and if he was arrested the vice president which would then be the vice president would pardon him. Also, if he didn't resign he'd likely be impeached anyway.
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.
A pyramid is usually used as a tomb, but I think they can be used as an arena as well.
You can search this up on the internet if you are not completely sure.
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Answer: No
Explanation: Because living in the 20th century has great things that the 1500s didn't have like technology. In the 1500s the Native Americas rapidly declined as well.According to Noble David Cook, a community of scholars has recently, albeit slowly, "been quietly accumulating piece by piece data on early epidemics in the Americas and their relation to the subjugation of native peoples."
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Because there will always be water on earth, meaning that the cycle will never stop. And because the cycle is continuous and natural. I don't think anything can stop it from happening.