What are feedback loops?

A feedback loop is when something causes a change, and that change makes things happen even more, like a snowball rolling down a hill.

Imagine you're playing with a toy car on a ramp. You push it just a little bit, and it starts to roll. As it goes faster, the ramp makes it go even faster, whoosh! Before you know it, the car is zooming like it’s been going for miles. That's a feedback loop in action: the speed helps it get even faster.

When Things Get Bigger

Sometimes feedback loops make things bigger and bigger, just like when you blow on a pinwheel, the harder you blow, the faster it spins, which makes it easier to blow even more!

When Things Calm Down

Other times, they help things calm down. Imagine you're at the park, and your friend is screaming because they dropped their ice cream. You laugh so hard that you start crying, but then your friend sees you crying and stops laughing. Now everyone is quiet again. That’s a feedback loop too, but it makes everything quieter instead of louder.

Feedback loops are everywhere: in nature, in machines, even in games! They're like little helpers that either make things go faster or help them slow down.

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Examples

  1. A feedback loop is like when you feel hot and take off your coat, making you even hotter.
  2. When a forest fire starts, it makes the air dry, which causes more fires, that's a positive feedback loop.
  3. Feedback loops can be seen in how you get louder when someone yells at you.

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Categories: Science · feedback· science· systems