Can I use the scientific method to prove that the Pyramids were created?

Yes. To be a bit more accurate ... it is a statement that must be testable, not a question. A statement like "the ancient Pyramids were created by humans."

1. There needs to be evidence of the timescale in which the pyramids appeared (radiometric dating of how old they are).

2. Given this you need to produce a description of the *mechanism*. Who were these humans? What kind of mechanisms were available for them to use? Where were the materials obtained?

3. Find evidence not only that it *may* have occurred this way, but evidence that it actually did (some historical records, some physical evidence of th transport of the materials, etc.).

4. If you are talking about humans creating something, then some theory as to the *reason* would be necessary (this is not necessary when postulating a *natural* cause).

No, the question cannot be conclusively tested.

An expensive enough experiment would probably provide practical evidence that the Pyramids COULD have been constructed by humans, using only the abilities and techniques which they are known or believed to have possessed. But it still would not PROVE that it was only humans who had done it.

If the experiment showed instead that it was not possible for humans to have constructed the pyramids with their known or presumed abilities, it would still prove nothing, just that if they had constructed them, there must be some information about their abilities which we still lack.

Not unless you have the wherewithal or financing for an extended personal on-site investigation. The pyramids were built, not created, and the consensus is that they were probably built by humans. There is always the splinter group however, who insist that humans did not have the requisite technology. Incontrovertible proof is really hard to come by in archeology.

You could test whether humans could have created the pyramids, but you can't test whether the far-fetched alternatives were also possible.

Though anyone who seriously believes aliens did anything isn't very scientific! :P You can't disprove that using the scientific method though, you'd have to talk theory.