Here is an experiment for you look on the Periodic Table of elemnets and look at the names of all the 103 discovered elements ..... fire is not among them neither is air, water or earth.
You could demonstrate that fire is not an element by capturing it in a container and showing that it can be extinguished, or by isolating the various components of fire (such as heat, fuel, and oxygen) and showing that fire cannot exist without them. This would illustrate that fire is a phenomenon resulting from a chemical reaction, not a fundamental element.
An experiment can prove or disprove a hypothesis.
Prove causation
That depends on the result of the experiment. The experiment is a way to test a hypothesis, and it's completely fine if the experiment disproves the hypothesis. Ideally, though, the experiment will support the hypothesis.
to prove it worked.
Galileo
An experiment can prove they are wrong or right ...:)
This was an experiment to prove universal gravitation!
An experiment can show: Cause and effect (Apex).
By experiment.
The Fire Chakra element allows you to use Fire Element Jutsus.. Like the Fireball Jutsu..
simply cover a burning candle with a glass to cut off the air, then the candle will burn out