imagine a snowflake in your hand, and you look at it, and it's an incredibly complicated, beautiful object. But as you heat it up, it'll melt into a pool of water, and you would be able to see that, actually, it was just made of H20, water.
imaxina un floco de neve na tua man, míralo e é un obxecto increíblemente compricado e belo. Pero se o quentas derretirase nunha poza, e poderás ver que en realidade estaba feito só de H2O, auga.