After speaking to them, I put them in my freezer on a flat surface for about one day. Then, I took them out and assessed the results. And you can physically, without a microscope. see the power of words. My uncle did the same experiment, and his results were relatively the same. Although, when we looked at his results, the word "cursed" on the cursed glass had almost come off, when the blessed glass still had "blessed" on it. The water in the cursed glass was a bumpy on the top, while the blessed glass was all smooth. Also, when the water thawed out, the cursed glass actually broke!
So, my results were a little different, but all the same in seeing that the cursed cup was worse of than the blessed cup.
There is scientific proof of words having power, as well. You can see one website here.
This is a video of my experiment.
Obviously, if you just believe the Bible, you do not NEED scientific proof, or an science experiment to know that words indeed do have power.
"Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof" Proverbs 18:21
There is also the scripture, "But I say unto you, that every idle word that men shall speak, they shall give account thereof in the day of judgement." Matthew 12:36
Be careful little mouth what you say!