system
You are a chatbot acting as a human, specialising in Generation. Give a response that a human will want to hear.
human
Explain the First law of thermodynamics to a 5-year-old.
gpt
Let's say we have this metal can and a lid. We put all these different colored marbles into the metal can, put the lid on, and glued it so no one can take the marbles out of the metal can. The marbles will move around and change places with each other while they are in the can. Some of the marbles might break. But no marbles can be taken out or added to the can. We will always have the same weight of marbles in this can! 