Question

Give an example to explain the difference between changes that can or cannot be reversed. [2 marks]

Answer 1

$\bullet$ Examples of reversible changes: Melting of ice into water: By freezing the water, we can obtain ice again. [1 mark]
$\bullet$ Example of irreversible changes: Burning of paper: When paper is burnt, it turns into ash. The ash cannot be turned back into paper. [1 mark]