An experiment is normally intended to test a hypothesis. Is there a noun or phrase to describe an experiment with no hypothesis -- i.e. doing something just to 'see what happens'?
(A convincing neologism would be acceptable: e.g. exploriment)
EDIT: It's been pointed out that one can think of some generalised hypothesis ('something interesting will happen') for any experiment. So to refine the question a bit: what's an experiment without a specific hypothesis?
EDIT2: Thanks for the helpful suggestions so far, which have clarified things, although sadly none have nailed it for me yet: perhaps English doesn't have a word with the connotation I'm looking for.
However I'm surprised that some of the answers have implied that there's something trivial, invalid or unscientific about experimenting without a testable hypothesis: i.e. it's "just playing about" or "just demonstration". This made me think about three types of experiment:
(A) I do something (heat water) to test a specific hypothesis (does water boil at 100°C?);
(B) I do it to measure a property (what temperature does water boil at?);
(C) I do it to observe what occurs (let's see what happens if I heat this water...).
These all seem to me to be very valid and scientific, but English doesn't seem to specifically distinguish between them. This post has turned out to be a very interesting experiment!