Science: melting and dissolving

In science today we thought about melting and dissolving. They are different.

• Melting is when one substance changes from solid to liquid.


• Dissolving is when a substance breaks up into very tiny pieces, in a liquid like water.

We dissolved sugar in water, and we tried to dissolve sand in water. The sand did not dissolve. After that we looked at melting wax in tea light candles. When the wax cooled, it became solid again.