Explain · Like I'm five version
Schrödinger's cat in terms of an unopened exam result
Is a cat in a box like a test score you have not looked at yet?
An unopened exam result is a bit like a cat hiding inside a cardboard box. You know there is something inside, but you have no idea if it is a happy pass or a sad fail. Until you open the envelope, the result is both good and bad at the same time. It is a strange feeling to know that your future is waiting for you, but you are not looking at it just yet.
This is exactly how a scientist named Erwin thought about his cat. He said if you cannot see the cat, you have to think of it as being both awake and asleep at once. Just like your envelope, the cat stays in this fuzzy middle state until someone finally peeks inside. The mystery only goes away when you lift the flap or open the lid. It sounds like magic, but it is just a way to talk about things we cannot see.
You might feel nervous while you hold the paper, just like you would wonder about the cat. Once you read the grade, the suspense disappears and the answer is fixed. You either have a big smile or you need a hug from your teacher. The cat also picks one thing to be once the box is open. Everything is clear again, and the waiting is finally over.
Where the analogy breaks downA cat is always alive or dead regardless of whether you look at it, whereas quantum states rely on the act of measurement to collapse.