Question

Paheli wants to know if you have ever seen a blacksmith making some tools. How does a blacksmith change a piece of iron into different tools and what kind of changes occur in the process?

Answer 1

$\bullet$ A blacksmith first heats a piece of iron till it becomes red hot. It softens and can be beaten into the desired shape. (1 Mark)
$\bullet$ Thus, iron, when heated and beaten, changes its shape. It can regain its initial shape when heated again and remoulded. (1 Mark)
$\bullet$ Since the change can be undone, it is a reversible change. (1 Mark)