noun, verbal noun
A test that tries to find truth is an experiment. This is because you don't know the truth, so the only way to find it is to try things out and test them. Thus, experiment!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Take note that the つ in じつ is turned into a small っ, though.
This is a science experiment.
When conducting an experiment, be sure to wear a helmet for safety.
Now, I'd like to try an experiment to see what I have to say to get my mother to give me money.