Salt dissolving in a glass of water, using electricity to break down water into hydrogen and oxygen, rust forming on an iron fence and gas burning on a stove.
Use a strip of paper covered in PH indicating dye.
Frost<span> forms when an outside surface cools past the dew point. The dew point is the point where the air gets so cold, the </span>water vapor<span> in the atmosphere turns into liquid. This liquid freezes. If it gets cold enough, little bits of ice, or </span>frost<span>, form. google</span>
