Properties of matter can change, and the changes can be observed. Matter--snow, ice, butter, candles, crayons, ice cream--reacts to changes in the environment, such as energy input in the form of heat.
Properties of matter can change, and the changes can be observed. Matter--snow, ice, butter, candles, crayons, ice cream--reacts to changes in the environment, such as energy input in the form of heat.