Caterham":1ehn3z52 said:This planet froze into a ball of ice more than once and the corals are still here. This is a fact.
Not really - too many fuzzy words in there. The corals that were under the ice are not still here (alive), and the corals (most of them) that are still here would not survive under the ice. Better would be 'The corals that survived previous ice ages developed over time into the corals that we see today'.
What is this Global Warming that people speak of? Is it a theory or is if fact?
Theory: A theory is what one or more hypotheses become once they have been verified and accepted to be true. A theory is an explanation of a set of related observations or events based upon proven hypotheses and verified multiple times by detached groups of researchers. Unfortunately, even some scientists often use the term "theory" in a more colloquial sense, when they really mean to say "hypothesis." That makes its true meaning in science even more confusing to the general public.
A simple analogy can be made using a slingshot and an automobile.
A scientific law is like a slingshot. A slingshot has but one moving part--the rubber band. If you put a rock in it and draw it back, the rock will fly out at a predictable speed, depending upon the distance the band is drawn back.
An automobile has many moving parts, all working in unison to perform the chore of transporting someone from one point to another point. An automobile is a complex piece of machinery. Sometimes, improvements are made to one or more component parts. A new set of spark plugs that are composed of a better alloy that can withstand heat better, for example, might replace the existing set. But the function of the automobile as a whole remains unchanged.
A theory is like the automobile. Components of it can be changed or improved upon, without changing the overall truth of the theory as a whole.