When you think of a balloon filled with air, it gets bigger and bigger. But if you keep blowing air into it, the balloon will suddenly burst. This means it pops and makes a loud noise because it can’t hold any more air. It’s like when you fill something too much, and it can’t hold it anymore, so it breaks or explodes.
Imagine a bubble in your bath. It’s shiny and round, floating on the water. But if you touch it too hard, it goes ‘pop’ and disappears. That’s because the bubble is very thin and delicate, and when it can’t hold its shape anymore, it bursts.
Think about a watermelon. If you squeeze it really hard, it might burst open, making a mess everywhere. This is because the watermelon is full of juice, and if too much pressure is put on it, it can’t stay whole.
A volcano is another example. Inside the Earth, there is hot, melted rock called magma. Sometimes, the pressure builds up so much that the ground can’t hold it anymore, and the volcano bursts, letting the magma flow out as lava.