How Does a Volcano Erupt in Slow Motion?

A volcano erupts when pressure builds up inside it and finally bursts out, just like a balloon popping after you keep blowing into it.

Imagine you have a big container (like a jar) filled with hot, sticky goo (like melted chocolate). This goo is called magma. It’s trapped under the ground by a strong lid, think of it as a hard shell made of rock.

As more and more magma is added from deep below, the container gets fuller and fuller. The pressure inside starts to grow, like when you put too much air into a balloon.

One day, the lid can’t hold back any longer, snap! It breaks open, and all that hot goo rushes out in a big rush, making a volcano eruption.

It’s just like when you squeeze toothpaste from a tube, at first it comes out slowly, but if you keep pressing hard enough, it all squirts out at once! A volcano erupts when pressure builds up inside it and finally bursts out, just like a balloon popping after you keep blowing into it.

Imagine you have a big container (like a jar) filled with hot, sticky goo (like melted chocolate). This goo is called magma. It’s trapped under the ground by a strong lid, think of it as a hard shell made of rock.

As more and more magma is added from deep below, the container gets fuller and fuller. The pressure inside starts to grow, like when you put too much air into a balloon.