What is Negative feedback?

Negative feedback is when something calms down after getting too big or too loud.

Imagine you're playing with a toy that makes a really loud noise, like a vacuum cleaner. At first, it’s super loud and annoying. But then, the toy notices it's been too loud for too long, so it decides to quiet itself down just a little bit. That way, the noise doesn’t keep getting louder and louder forever.

Think about your house’s thermostat, that thing you set when you want it to be warm or cool. If it gets too hot inside, the thermostat tells the air conditioner to turn on and bring the temperature down. Once it's comfortable again, the air conditioner turns off. That’s negative feedback in action: something is happening (the temperature goes up), and then a system steps in to make things better (cool it down).

It’s like when you're on a swing, you go really high, but then you slow down until you’re just gently swaying. Your body helps you balance out the big movement so you don’t keep going higher and higher forever.

Negative feedback is all about keeping things in check, like a friendly helper who makes sure everything stays just right.