Why do forest fire smoke plumes rise into the sky?

Forest fire smoke plumes rise into the sky because hot air is lighter than cold air and wants to float up.

Imagine you're blowing a bubble with your breath, the warm air from your mouth makes the bubble go up. That’s kind of what happens with forest fires. When trees burn, they make hot air, and that hot air carries the smoke with it.

Hot air is like a balloon filled with warm air, it wants to float above cooler air. In the same way, when fire burns, it warms up the air around it. This warm air becomes less dense, so it moves upward, taking the smoke along for the ride.

Think of smoke as tiny bits floating in the hot air, like dust particles on a balloon. As the hot air rises, these bits are lifted higher and higher into the sky, that’s why you see smoke plumes rising from a fire far away.

So next time you see smoke from a fire going up, picture it as a big bubble of warm air taking all those tiny bits with it on a journey to the sky!