Which best describes scientific facts?

observable and objective

true and subjective

unsupported and believed

estimated and unquestioned

Observable and objective best describes scientific facts

Observable and objective

Explanation:

Scientific facts require repeatable experiments or proven qualities that can be repeated over and over again. If you do an experiment to verify a scientific fact, I should be able to do the same experiment and get the same result.

A scientific fact does not and cannot change.