ELI5: Explain Like I'm 5

Fuel gauge

A fuel gauge is like a little thermometer that tells you how much gas is in your car. It has a needle that points to different numbers or words that show how much gas you have left. It's kind of like when you have a orange juice carton and there is a line on the side that tells you how much is left in the carton. Your car needs gas to run, just like your body needs food to have energy. So it's important to know how much gas is left so you don't run out and get stuck somewhere.
Related topics others have asked about: