'In Science, we have been doing lots of fun experiments! One of them was about what happens when different materials are burnt.

We tested different materials to see if they changed in a way that could be undone (reversible change) or if they changed forever (irreversible change).

A reversible change means that a material can go back to how it was before, even after being mixed or changed.

An irreversible change means that once the material has changed, it cannot go back to how it was before.

From my experiment, I found out that some materials, when burnt, turn into something new and cannot change back - this is an irreversible change. But some materials did not change much when burnt, so their change was reversible.' - M. Ayyaan.H