Year 5 Science: Reversible and Irreversible Changes

Oooohhhhhhs, yucks and wows were all audible from the Year 5 classroom as they explored and experimented with reversible and irreversible changes. Milk and vinegar (the reactants) were combined to create a plastic like substance (the product) … and also a rather nasty smell. The less offensive water and flour reactants produced a potentially delicious pizza dough. However, the most surprising product was the gas that was created when vinegar and bicarbonate of soda reacted together; enough carbon dioxide was made to inflate a balloon! The experiments sparked much discussion about whether these changes were reversible or irreversible.