yes
true
true
true
I think it is hypothesis because in the light of the observed facts and previously collected information scientists make'intelligent guesses' as to what may be the possible answer to this particular question.
Yes, the conjugation (or plural of a guess) is "guesses." I guess. You guess. He guesses.
they made random guesses they made random guesses they made random guesses
The possessive form for the singular noun guess is guess's.
It was not a "law". It was considered a theory. All theories are best guesses using all known information until further information comes along. Gravity is a theory.
The plural of guess is guesses, e.g. It took him several guesses before he got the answer.
The word guesses has two syllables. The syllables are divided like so: guess-es.
guesses
They are best guesses