system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does it mean in Quantum Physics when something is changed by watching it?

How does that even work?
gpt
Consider that this can happen on a larger scale as well.  If you stick a regular meat thermometer into a pool, the overall temperature of the pool will not change.  If you use the same thermometer to measure the temperature of a tiny drop of water, the thermometer's temperature will change the temperature of that little drop.