Flammability limit

Flammability limit is a fancy word that tells us how much of something needs to be in the air so it can light on fire. Think of when you cook over a stove and you turn on a flame, the fire needs something to ignite and burn.

When we use gas or other fuels, we need to make sure that we have just the right amount in the air so that it can be useful but not too much that it can start a fire. The amount of fuel in the air that can cause a fire is called the upper flammability limit, and the amount that is too low to ignite is the lower flammability limit.

So basically, flammability limit is a bunch of rules to keep us safe when we use things that can start fires. It is important to follow the rules and not use too much fuel, or else we might accidentally start a fire and get hurt.