Question

Identify the following as reversible or irreversible changes, with reasons:
i) mixing iron filings and sand
ii) shattering of glass
iii) melting of ice

Answer 1

i) Mixing iron filings and sand is a reversible change, as iron filings can be separated from sand using a magnet. [1 Mark]

ii) Shattering of glass is an irreversible change as the small shattered glass pieces cannot be made back into the glass. [1 Mark]

iii) Melting of ice is a reversible change since water can be frozen back into ice. [1 Mark]