Experiment · 10–15 min

Does sugar disappear when you can't see it?

You pour sugar into water, stir – and it's gone. Really gone? A scale can tell.

A lidded plastic container of water, a bowl of sugar, a teaspoon and a kitchen scale.

What do you think?

A closed container of water, and sugar weighed separately. How much will the container weigh once the sugar has dissolved in it?