There is no such correlation. It is a myth.
Miami is not the capital city but it is the most populous city. The capital of Florida is Tallahassee.
Yes
No, it is not. Consider Florida, Texas, California or Nevada.
No, it is not. Consider Florida, Texas, California or Nevada.
It is always considered as plural.
Yes, I is always capital.
No.
No
Well, honey, "scissors" is technically a plural noun. You don't say "a scissors," you say "a pair of scissors." So, if you're talking about just one of those cutting contraptions, you're gonna have to say "scissor" and sound a bit strange. But hey, language is weird like that.
No, Florida is not always covered in snow. In fact, Florida rarely ever has snow, and if ever there will be snow in Florida, it will be in the northern parts.
The area now known as Florida was not always a part of the US.
"Florida" is a noun, and a proper noun at that; therefore, it should always begin with a capital letter.